/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 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:50:52,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:50:52,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:50:52,067 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:50:52,116 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 [2021-06-12 19:50:52,147 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:50:52,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:50:52,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:50:52,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:50:52,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:50:52,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:50:52,151 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:50:52,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:50:52,151 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:50:52,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:50:52,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:50:52,153 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:50:52,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:50:52,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:50:52,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:50:52,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:50:52,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:50:52,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:50:52,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:50:52,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:50:52,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:50:52,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:50:52,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:50:52,155 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:50:52,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:50:52,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:50:52,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:50:52,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:50:52,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:50:52,478 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:50:52,481 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:50:52,482 INFO L432 ainManager$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 [2021-06-12 19:50:52,482 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-trans.wvr.bpl' [2021-06-12 19:50:52,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:50:52,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:50:52,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:50:52,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:50:52,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:50:52,545 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,553 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,560 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:50:52,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:50:52,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:50:52,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:50:52,570 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,570 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,582 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,582 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,589 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,592 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,593 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 12.06 07:50:52" (1/1) ... [2021-06-12 19:50:52,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:50:52,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:50:52,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:50:52,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:50:52,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:52" (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 [2021-06-12 19:50:52,671 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:50:52,671 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:50:52,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:50:52,672 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:50:52,672 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:50:52,672 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:50:52,672 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:50:52,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:50:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:50:52,673 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 19:50:52,673 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 19:50:52,673 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 19:50:52,674 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:50:52,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:50:52,995 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-12 19:50:52,996 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 19:50:52,996 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 19:50:52,996 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-12 19:50:52,997 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:50:52 BoogieIcfgContainer [2021-06-12 19:50:52,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:50:52,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:50:52,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:50:53,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:50:53,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:52" (1/2) ... [2021-06-12 19:50:53,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552c66b0 and model type array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:50:53, skipping insertion in model container [2021-06-12 19:50:53,002 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 12.06 07:50:52" (2/2) ... [2021-06-12 19:50:53,003 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-trans.wvr.bpl [2021-06-12 19:50:53,008 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:50:53,008 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:50:53,032 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:50:53,033 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:50:53,096 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 19:50:53,122 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 19:50:53,154 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:50:53,154 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:50:53,155 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:50:53,155 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:50:53,155 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:50:53,155 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:50:53,155 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:50:53,155 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:50:53,166 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 22 transitions, 68 flow [2021-06-12 19:50:53,183 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,186 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:50:53,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:53,194 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:53,195 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2084068600, now seen corresponding path program 1 times [2021-06-12 19:50:53,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:53,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152486337] [2021-06-12 19:50:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:53,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:53,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152486337] [2021-06-12 19:50:53,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152486337] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:53,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:53,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:53,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247133571] [2021-06-12 19:50:53,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:53,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:53,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:53,432 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.7818181818181817) internal successors, (153), 56 states have internal predecessors, (153), 0 states have call successors, (0), 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) [2021-06-12 19:50:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:53,580 INFO L93 Difference]: Finished difference Result 139 states and 379 transitions. [2021-06-12 19:50:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:53,582 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 [2021-06-12 19:50:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:53,598 INFO L225 Difference]: With dead ends: 139 [2021-06-12 19:50:53,598 INFO L226 Difference]: Without dead ends: 135 [2021-06-12 19:50:53,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-12 19:50:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 84. [2021-06-12 19:50:53,653 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) [2021-06-12 19:50:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 234 transitions. [2021-06-12 19:50:53,659 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 234 transitions. Word has length 14 [2021-06-12 19:50:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:53,660 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 234 transitions. [2021-06-12 19:50:53,660 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) [2021-06-12 19:50:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 234 transitions. [2021-06-12 19:50:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:50:53,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:53,664 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:53,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:50:53,665 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:53,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1063669592, now seen corresponding path program 2 times [2021-06-12 19:50:53,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:53,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892861093] [2021-06-12 19:50:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:53,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:53,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892861093] [2021-06-12 19:50:53,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892861093] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:53,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:53,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:53,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178867083] [2021-06-12 19:50:53,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:53,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:53,737 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) [2021-06-12 19:50:53,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:53,841 INFO L93 Difference]: Finished difference Result 156 states and 429 transitions. [2021-06-12 19:50:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:53,841 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 [2021-06-12 19:50:53,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:53,844 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:50:53,844 INFO L226 Difference]: Without dead ends: 152 [2021-06-12 19:50:53,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:53,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-12 19:50:53,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2021-06-12 19:50:53,863 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) [2021-06-12 19:50:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 252 transitions. [2021-06-12 19:50:53,864 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 252 transitions. Word has length 14 [2021-06-12 19:50:53,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:53,864 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 252 transitions. [2021-06-12 19:50:53,865 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) [2021-06-12 19:50:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 252 transitions. [2021-06-12 19:50:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:50:53,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:53,867 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:53,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:50:53,867 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 284971666, now seen corresponding path program 3 times [2021-06-12 19:50:53,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:53,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548155544] [2021-06-12 19:50:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:53,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:53,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:53,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548155544] [2021-06-12 19:50:53,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548155544] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:53,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:53,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:53,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868534181] [2021-06-12 19:50:53,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:53,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:53,910 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) [2021-06-12 19:50:53,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:53,990 INFO L93 Difference]: Finished difference Result 169 states and 467 transitions. [2021-06-12 19:50:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:53,993 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 [2021-06-12 19:50:53,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:53,995 INFO L225 Difference]: With dead ends: 169 [2021-06-12 19:50:53,995 INFO L226 Difference]: Without dead ends: 165 [2021-06-12 19:50:54,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:54,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-12 19:50:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 94. [2021-06-12 19:50:54,015 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) [2021-06-12 19:50:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 264 transitions. [2021-06-12 19:50:54,016 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 264 transitions. Word has length 14 [2021-06-12 19:50:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,016 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 264 transitions. [2021-06-12 19:50:54,017 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) [2021-06-12 19:50:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 264 transitions. [2021-06-12 19:50:54,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:50:54,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,018 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:50:54,019 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,020 INFO L82 PathProgramCache]: Analyzing trace with hash -791726200, now seen corresponding path program 4 times [2021-06-12 19:50:54,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018050022] [2021-06-12 19:50:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018050022] [2021-06-12 19:50:54,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018050022] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:54,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:54,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290849845] [2021-06-12 19:50:54,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:54,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:54,059 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) [2021-06-12 19:50:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:54,134 INFO L93 Difference]: Finished difference Result 173 states and 479 transitions. [2021-06-12 19:50:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:54,135 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 [2021-06-12 19:50:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:54,136 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:50:54,136 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:50:54,137 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:54,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:50:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-06-12 19:50:54,142 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) [2021-06-12 19:50:54,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 276 transitions. [2021-06-12 19:50:54,142 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 276 transitions. Word has length 14 [2021-06-12 19:50:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,143 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 276 transitions. [2021-06-12 19:50:54,143 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) [2021-06-12 19:50:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 276 transitions. [2021-06-12 19:50:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:50:54,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,144 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 19:50:54,144 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1403359368, now seen corresponding path program 5 times [2021-06-12 19:50:54,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733314673] [2021-06-12 19:50:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733314673] [2021-06-12 19:50:54,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733314673] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:54,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:54,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:54,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751875813] [2021-06-12 19:50:54,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:54,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:54,176 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) [2021-06-12 19:50:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:54,254 INFO L93 Difference]: Finished difference Result 176 states and 489 transitions. [2021-06-12 19:50:54,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:54,254 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 [2021-06-12 19:50:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:54,255 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:50:54,255 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:50:54,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:50:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 100. [2021-06-12 19:50:54,260 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) [2021-06-12 19:50:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-12 19:50:54,260 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-06-12 19:50:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,261 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-12 19:50:54,261 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) [2021-06-12 19:50:54,261 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-12 19:50:54,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:50:54,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,262 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 19:50:54,262 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1756874686, now seen corresponding path program 6 times [2021-06-12 19:50:54,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592269986] [2021-06-12 19:50:54,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592269986] [2021-06-12 19:50:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592269986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:54,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:54,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:54,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952372883] [2021-06-12 19:50:54,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:54,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:54,290 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) [2021-06-12 19:50:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:54,361 INFO L93 Difference]: Finished difference Result 174 states and 483 transitions. [2021-06-12 19:50:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:54,362 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 [2021-06-12 19:50:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:54,363 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:50:54,363 INFO L226 Difference]: Without dead ends: 170 [2021-06-12 19:50:54,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-12 19:50:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2021-06-12 19:50:54,378 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) [2021-06-12 19:50:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-06-12 19:50:54,378 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 14 [2021-06-12 19:50:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,380 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-06-12 19:50:54,380 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) [2021-06-12 19:50:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-06-12 19:50:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:54,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,381 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:50:54,382 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1483038554, now seen corresponding path program 1 times [2021-06-12 19:50:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018397615] [2021-06-12 19:50:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018397615] [2021-06-12 19:50:54,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018397615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782470241] [2021-06-12 19:50:54,484 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 [2021-06-12 19:50:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:50:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782470241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:54,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:50:54,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132415915] [2021-06-12 19:50:54,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:50:54,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:50:54,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:54,734 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) [2021-06-12 19:50:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:54,844 INFO L93 Difference]: Finished difference Result 179 states and 476 transitions. [2021-06-12 19:50:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:50:54,844 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 [2021-06-12 19:50:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:54,845 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:50:54,846 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 19:50:54,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 19:50:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-06-12 19:50:54,850 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) [2021-06-12 19:50:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 316 transitions. [2021-06-12 19:50:54,851 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 316 transitions. Word has length 15 [2021-06-12 19:50:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,851 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 316 transitions. [2021-06-12 19:50:54,851 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) [2021-06-12 19:50:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 316 transitions. [2021-06-12 19:50:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:54,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,851 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:55,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 19:50:55,075 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash -180956976, now seen corresponding path program 1 times [2021-06-12 19:50:55,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:55,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416082571] [2021-06-12 19:50:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416082571] [2021-06-12 19:50:55,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416082571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787583444] [2021-06-12 19:50:55,156 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 [2021-06-12 19:50:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:55,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:55,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787583444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:55,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:50:55,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4361706] [2021-06-12 19:50:55,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:50:55,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:55,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:50:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:50:55,369 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) [2021-06-12 19:50:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:55,526 INFO L93 Difference]: Finished difference Result 173 states and 446 transitions. [2021-06-12 19:50:55,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:55,527 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 [2021-06-12 19:50:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:55,528 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:50:55,528 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 19:50:55,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 19:50:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 110. [2021-06-12 19:50:55,534 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) [2021-06-12 19:50:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 306 transitions. [2021-06-12 19:50:55,535 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 306 transitions. Word has length 15 [2021-06-12 19:50:55,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:55,535 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 306 transitions. [2021-06-12 19:50:55,535 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) [2021-06-12 19:50:55,535 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 306 transitions. [2021-06-12 19:50:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:55,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:55,536 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:55,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:55,749 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1385320832, now seen corresponding path program 2 times [2021-06-12 19:50:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:55,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772614614] [2021-06-12 19:50:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:55,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772614614] [2021-06-12 19:50:55,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772614614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342457642] [2021-06-12 19:50:55,807 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 [2021-06-12 19:50:55,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:55,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342457642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:55,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:50:55,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502836293] [2021-06-12 19:50:55,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:55,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:55,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:55,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:55,975 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) [2021-06-12 19:50:56,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:56,131 INFO L93 Difference]: Finished difference Result 193 states and 494 transitions. [2021-06-12 19:50:56,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:56,131 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 [2021-06-12 19:50:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:56,132 INFO L225 Difference]: With dead ends: 193 [2021-06-12 19:50:56,133 INFO L226 Difference]: Without dead ends: 177 [2021-06-12 19:50:56,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-06-12 19:50:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2021-06-12 19:50:56,137 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) [2021-06-12 19:50:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 326 transitions. [2021-06-12 19:50:56,138 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 326 transitions. Word has length 15 [2021-06-12 19:50:56,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:56,138 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 326 transitions. [2021-06-12 19:50:56,138 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) [2021-06-12 19:50:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 326 transitions. [2021-06-12 19:50:56,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:56,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:56,138 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:56,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 19:50:56,353 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash 951223692, now seen corresponding path program 3 times [2021-06-12 19:50:56,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:56,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775986608] [2021-06-12 19:50:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:56,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:56,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775986608] [2021-06-12 19:50:56,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775986608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:56,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999775193] [2021-06-12 19:50:56,419 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 [2021-06-12 19:50:56,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:50:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:50:56,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:56,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999775193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:56,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:56,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-12 19:50:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423687297] [2021-06-12 19:50:56,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:56,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:56,561 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) [2021-06-12 19:50:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:57,093 INFO L93 Difference]: Finished difference Result 240 states and 644 transitions. [2021-06-12 19:50:57,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:50:57,094 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 [2021-06-12 19:50:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:57,095 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:50:57,095 INFO L226 Difference]: Without dead ends: 188 [2021-06-12 19:50:57,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:50:57,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-12 19:50:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 114. [2021-06-12 19:50:57,100 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) [2021-06-12 19:50:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 323 transitions. [2021-06-12 19:50:57,100 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 323 transitions. Word has length 15 [2021-06-12 19:50:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:57,101 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 323 transitions. [2021-06-12 19:50:57,101 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) [2021-06-12 19:50:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 323 transitions. [2021-06-12 19:50:57,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:57,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:57,101 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:57,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:57,317 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:57,317 INFO L82 PathProgramCache]: Analyzing trace with hash 479848854, now seen corresponding path program 1 times [2021-06-12 19:50:57,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:57,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524190979] [2021-06-12 19:50:57,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524190979] [2021-06-12 19:50:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524190979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121157312] [2021-06-12 19:50:57,364 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 [2021-06-12 19:50:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:57,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121157312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:57,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:50:57,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220195879] [2021-06-12 19:50:57,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:50:57,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:50:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:50:57,509 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) [2021-06-12 19:50:57,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:57,642 INFO L93 Difference]: Finished difference Result 191 states and 526 transitions. [2021-06-12 19:50:57,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:57,642 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 [2021-06-12 19:50:57,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:57,651 INFO L225 Difference]: With dead ends: 191 [2021-06-12 19:50:57,651 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:50:57,651 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:57,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:50:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 122. [2021-06-12 19:50:57,655 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) [2021-06-12 19:50:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 352 transitions. [2021-06-12 19:50:57,656 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 352 transitions. Word has length 15 [2021-06-12 19:50:57,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:57,656 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 352 transitions. [2021-06-12 19:50:57,656 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) [2021-06-12 19:50:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 352 transitions. [2021-06-12 19:50:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:57,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:57,657 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:57,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 19:50:57,869 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:57,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:57,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1061667084, now seen corresponding path program 2 times [2021-06-12 19:50:57,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:57,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784113583] [2021-06-12 19:50:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:57,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784113583] [2021-06-12 19:50:57,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784113583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613152849] [2021-06-12 19:50:57,918 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 [2021-06-12 19:50:57,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:57,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:50:57,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:58,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613152849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:58,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:58,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-06-12 19:50:58,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433920446] [2021-06-12 19:50:58,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:50:58,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:50:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:50:58,010 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) [2021-06-12 19:50:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:58,265 INFO L93 Difference]: Finished difference Result 222 states and 617 transitions. [2021-06-12 19:50:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:50:58,266 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 [2021-06-12 19:50:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:58,268 INFO L225 Difference]: With dead ends: 222 [2021-06-12 19:50:58,268 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:50:58,268 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:50:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:50:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 128. [2021-06-12 19:50:58,272 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) [2021-06-12 19:50:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 373 transitions. [2021-06-12 19:50:58,273 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 373 transitions. Word has length 15 [2021-06-12 19:50:58,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:58,273 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 373 transitions. [2021-06-12 19:50:58,273 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) [2021-06-12 19:50:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 373 transitions. [2021-06-12 19:50:58,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:58,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:58,274 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:58,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:50:58,497 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:58,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:58,497 INFO L82 PathProgramCache]: Analyzing trace with hash 425707830, now seen corresponding path program 2 times [2021-06-12 19:50:58,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:58,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855456662] [2021-06-12 19:50:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:58,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:58,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855456662] [2021-06-12 19:50:58,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855456662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:58,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784218435] [2021-06-12 19:50:58,545 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 [2021-06-12 19:50:58,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:58,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:58,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:58,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:58,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784218435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:58,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:58,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 19:50:58,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638867120] [2021-06-12 19:50:58,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:58,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:58,697 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) [2021-06-12 19:50:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:59,176 INFO L93 Difference]: Finished difference Result 285 states and 767 transitions. [2021-06-12 19:50:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:50:59,176 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 [2021-06-12 19:50:59,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:59,179 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:50:59,179 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 19:50:59,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:50:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 19:50:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2021-06-12 19:50:59,186 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) [2021-06-12 19:50:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 434 transitions. [2021-06-12 19:50:59,187 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 434 transitions. Word has length 15 [2021-06-12 19:50:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:59,187 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 434 transitions. [2021-06-12 19:50:59,187 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) [2021-06-12 19:50:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 434 transitions. [2021-06-12 19:50:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:59,188 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:59,188 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:59,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:59,412 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1238287700, now seen corresponding path program 4 times [2021-06-12 19:50:59,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:59,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519094676] [2021-06-12 19:50:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:59,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:59,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519094676] [2021-06-12 19:50:59,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519094676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:59,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588598562] [2021-06-12 19:50:59,461 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 [2021-06-12 19:50:59,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:59,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:59,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:50:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588598562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:59,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:59,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:50:59,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287906655] [2021-06-12 19:50:59,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:59,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:59,608 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) [2021-06-12 19:50:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:59,728 INFO L93 Difference]: Finished difference Result 240 states and 643 transitions. [2021-06-12 19:50:59,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:59,728 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 [2021-06-12 19:50:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:59,729 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:50:59,730 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:50:59,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:59,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:50:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 145. [2021-06-12 19:50:59,735 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) [2021-06-12 19:50:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 436 transitions. [2021-06-12 19:50:59,736 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 436 transitions. Word has length 15 [2021-06-12 19:50:59,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:59,736 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 436 transitions. [2021-06-12 19:50:59,737 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) [2021-06-12 19:50:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 436 transitions. [2021-06-12 19:50:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:50:59,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:59,737 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:59,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 19:50:59,957 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:59,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1919639656, now seen corresponding path program 5 times [2021-06-12 19:50:59,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:59,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772109684] [2021-06-12 19:50:59,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:00,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772109684] [2021-06-12 19:51:00,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772109684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282104217] [2021-06-12 19:51:00,005 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 [2021-06-12 19:51:00,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:00,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282104217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:00,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:51:00,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933517156] [2021-06-12 19:51:00,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:51:00,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:00,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:51:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:51:00,112 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) [2021-06-12 19:51:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:00,208 INFO L93 Difference]: Finished difference Result 226 states and 636 transitions. [2021-06-12 19:51:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:00,208 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 [2021-06-12 19:51:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:00,210 INFO L225 Difference]: With dead ends: 226 [2021-06-12 19:51:00,210 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:51:00,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:51:00,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 156. [2021-06-12 19:51:00,215 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) [2021-06-12 19:51:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 458 transitions. [2021-06-12 19:51:00,216 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 458 transitions. Word has length 15 [2021-06-12 19:51:00,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:00,216 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 458 transitions. [2021-06-12 19:51:00,216 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) [2021-06-12 19:51:00,216 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 458 transitions. [2021-06-12 19:51:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:00,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:00,217 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:00,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:00,433 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash 261780050, now seen corresponding path program 3 times [2021-06-12 19:51:00,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:00,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327579636] [2021-06-12 19:51:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:00,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327579636] [2021-06-12 19:51:00,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327579636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537165910] [2021-06-12 19:51:00,475 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 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 [2021-06-12 19:51:00,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:00,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:00,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:00,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537165910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:00,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 19:51:00,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076882176] [2021-06-12 19:51:00,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:00,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:00,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:00,571 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) [2021-06-12 19:51:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:01,017 INFO L93 Difference]: Finished difference Result 360 states and 970 transitions. [2021-06-12 19:51:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:51:01,018 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 [2021-06-12 19:51:01,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:01,021 INFO L225 Difference]: With dead ends: 360 [2021-06-12 19:51:01,021 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 19:51:01,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:51:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 19:51:01,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 169. [2021-06-12 19:51:01,028 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) [2021-06-12 19:51:01,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 506 transitions. [2021-06-12 19:51:01,029 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 506 transitions. Word has length 15 [2021-06-12 19:51:01,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:01,030 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 506 transitions. [2021-06-12 19:51:01,030 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) [2021-06-12 19:51:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 506 transitions. [2021-06-12 19:51:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:01,030 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:01,030 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:01,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:01,239 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:01,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:01,239 INFO L82 PathProgramCache]: Analyzing trace with hash 970590554, now seen corresponding path program 6 times [2021-06-12 19:51:01,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:01,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803250940] [2021-06-12 19:51:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:01,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803250940] [2021-06-12 19:51:01,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803250940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:01,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383675717] [2021-06-12 19:51:01,292 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 [2021-06-12 19:51:01,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:01,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:01,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:01,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383675717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:01,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:01,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-12 19:51:01,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290675627] [2021-06-12 19:51:01,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:01,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:01,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:01,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:01,418 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) [2021-06-12 19:51:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:01,918 INFO L93 Difference]: Finished difference Result 395 states and 1063 transitions. [2021-06-12 19:51:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:01,919 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 [2021-06-12 19:51:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:01,921 INFO L225 Difference]: With dead ends: 395 [2021-06-12 19:51:01,921 INFO L226 Difference]: Without dead ends: 351 [2021-06-12 19:51:01,921 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:01,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-12 19:51:01,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 188. [2021-06-12 19:51:01,928 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) [2021-06-12 19:51:01,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 585 transitions. [2021-06-12 19:51:01,929 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 585 transitions. Word has length 15 [2021-06-12 19:51:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:01,929 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 585 transitions. [2021-06-12 19:51:01,929 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) [2021-06-12 19:51:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 585 transitions. [2021-06-12 19:51:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:01,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:01,930 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:02,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 19:51:02,143 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1191223272, now seen corresponding path program 3 times [2021-06-12 19:51:02,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:02,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351686479] [2021-06-12 19:51:02,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:02,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:02,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351686479] [2021-06-12 19:51:02,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351686479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:02,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553317619] [2021-06-12 19:51:02,180 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 [2021-06-12 19:51:02,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:02,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:02,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:02,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553317619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:02,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:02,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 19:51:02,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522470701] [2021-06-12 19:51:02,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:02,343 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) [2021-06-12 19:51:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:02,772 INFO L93 Difference]: Finished difference Result 296 states and 839 transitions. [2021-06-12 19:51:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:02,773 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 [2021-06-12 19:51:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:02,774 INFO L225 Difference]: With dead ends: 296 [2021-06-12 19:51:02,774 INFO L226 Difference]: Without dead ends: 257 [2021-06-12 19:51:02,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-12 19:51:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 185. [2021-06-12 19:51:02,780 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) [2021-06-12 19:51:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 571 transitions. [2021-06-12 19:51:02,781 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 571 transitions. Word has length 15 [2021-06-12 19:51:02,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:02,781 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 571 transitions. [2021-06-12 19:51:02,781 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) [2021-06-12 19:51:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 571 transitions. [2021-06-12 19:51:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:02,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:02,782 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:03,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:03,006 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:03,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1752078530, now seen corresponding path program 4 times [2021-06-12 19:51:03,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:03,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102903584] [2021-06-12 19:51:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:03,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:03,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102903584] [2021-06-12 19:51:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102903584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234312550] [2021-06-12 19:51:03,039 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 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 [2021-06-12 19:51:03,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:03,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:03,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:03,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234312550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:03,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:03,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:51:03,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587779431] [2021-06-12 19:51:03,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:51:03,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:51:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:51:03,120 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) [2021-06-12 19:51:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:03,200 INFO L93 Difference]: Finished difference Result 224 states and 652 transitions. [2021-06-12 19:51:03,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:03,201 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 [2021-06-12 19:51:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:03,202 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:51:03,202 INFO L226 Difference]: Without dead ends: 204 [2021-06-12 19:51:03,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:03,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-12 19:51:03,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 180. [2021-06-12 19:51:03,207 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) [2021-06-12 19:51:03,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 552 transitions. [2021-06-12 19:51:03,208 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 552 transitions. Word has length 15 [2021-06-12 19:51:03,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:03,208 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 552 transitions. [2021-06-12 19:51:03,208 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) [2021-06-12 19:51:03,209 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 552 transitions. [2021-06-12 19:51:03,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:03,209 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:03,209 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:03,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 19:51:03,433 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:03,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:03,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1743627284, now seen corresponding path program 7 times [2021-06-12 19:51:03,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:03,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772997797] [2021-06-12 19:51:03,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:03,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:03,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772997797] [2021-06-12 19:51:03,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772997797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:03,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213055972] [2021-06-12 19:51:03,486 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 [2021-06-12 19:51:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:03,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:03,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:03,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213055972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:03,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:03,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:03,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491714167] [2021-06-12 19:51:03,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:03,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:03,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:03,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:03,671 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) [2021-06-12 19:51:03,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:03,787 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-06-12 19:51:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:03,787 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 [2021-06-12 19:51:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:03,788 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:51:03,788 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:51:03,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:51:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 178. [2021-06-12 19:51:03,796 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) [2021-06-12 19:51:03,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 546 transitions. [2021-06-12 19:51:03,797 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 546 transitions. Word has length 15 [2021-06-12 19:51:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:03,797 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 546 transitions. [2021-06-12 19:51:03,797 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) [2021-06-12 19:51:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 546 transitions. [2021-06-12 19:51:03,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:03,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:03,798 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:03,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:03,998 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:03,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1883825052, now seen corresponding path program 8 times [2021-06-12 19:51:03,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:03,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943027938] [2021-06-12 19:51:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:04,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:04,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:04,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943027938] [2021-06-12 19:51:04,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943027938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:04,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662168774] [2021-06-12 19:51:04,045 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 [2021-06-12 19:51:04,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:04,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662168774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:04,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:04,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-12 19:51:04,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839763500] [2021-06-12 19:51:04,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:04,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:04,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:04,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:04,182 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) [2021-06-12 19:51:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:04,726 INFO L93 Difference]: Finished difference Result 322 states and 890 transitions. [2021-06-12 19:51:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:04,726 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 [2021-06-12 19:51:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:04,728 INFO L225 Difference]: With dead ends: 322 [2021-06-12 19:51:04,728 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:51:04,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:51:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:51:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 168. [2021-06-12 19:51:04,736 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) [2021-06-12 19:51:04,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 504 transitions. [2021-06-12 19:51:04,736 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 504 transitions. Word has length 15 [2021-06-12 19:51:04,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:04,737 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 504 transitions. [2021-06-12 19:51:04,737 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) [2021-06-12 19:51:04,737 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 504 transitions. [2021-06-12 19:51:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:04,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:04,738 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:04,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 19:51:04,953 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2044993746, now seen corresponding path program 9 times [2021-06-12 19:51:04,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:04,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741033459] [2021-06-12 19:51:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:05,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741033459] [2021-06-12 19:51:05,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741033459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645008555] [2021-06-12 19:51:05,023 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 [2021-06-12 19:51:05,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:05,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:05,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:05,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645008555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:05,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:05,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742110788] [2021-06-12 19:51:05,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:05,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:05,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:05,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:05,164 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) [2021-06-12 19:51:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:05,288 INFO L93 Difference]: Finished difference Result 251 states and 721 transitions. [2021-06-12 19:51:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:05,288 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 [2021-06-12 19:51:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:05,290 INFO L225 Difference]: With dead ends: 251 [2021-06-12 19:51:05,290 INFO L226 Difference]: Without dead ends: 240 [2021-06-12 19:51:05,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-06-12 19:51:05,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 167. [2021-06-12 19:51:05,295 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) [2021-06-12 19:51:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 501 transitions. [2021-06-12 19:51:05,295 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 501 transitions. Word has length 15 [2021-06-12 19:51:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:05,296 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 501 transitions. [2021-06-12 19:51:05,296 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) [2021-06-12 19:51:05,296 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 501 transitions. [2021-06-12 19:51:05,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:05,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:05,296 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:05,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:05,517 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:05,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:05,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1908842768, now seen corresponding path program 4 times [2021-06-12 19:51:05,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:05,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733828846] [2021-06-12 19:51:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:05,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733828846] [2021-06-12 19:51:05,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733828846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068587883] [2021-06-12 19:51:05,561 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 [2021-06-12 19:51:05,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:05,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:05,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:05,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068587883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:05,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:51:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744463269] [2021-06-12 19:51:05,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:51:05,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:51:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:51:05,641 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) [2021-06-12 19:51:05,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:05,739 INFO L93 Difference]: Finished difference Result 216 states and 623 transitions. [2021-06-12 19:51:05,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:05,740 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 [2021-06-12 19:51:05,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:05,741 INFO L225 Difference]: With dead ends: 216 [2021-06-12 19:51:05,741 INFO L226 Difference]: Without dead ends: 194 [2021-06-12 19:51:05,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-12 19:51:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 173. [2021-06-12 19:51:05,745 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) [2021-06-12 19:51:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 508 transitions. [2021-06-12 19:51:05,745 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 508 transitions. Word has length 15 [2021-06-12 19:51:05,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:05,745 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 508 transitions. [2021-06-12 19:51:05,746 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) [2021-06-12 19:51:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 508 transitions. [2021-06-12 19:51:05,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:05,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:05,746 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:05,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:05,969 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:05,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:05,970 INFO L82 PathProgramCache]: Analyzing trace with hash -838645562, now seen corresponding path program 10 times [2021-06-12 19:51:05,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:05,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863743970] [2021-06-12 19:51:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863743970] [2021-06-12 19:51:06,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863743970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088654576] [2021-06-12 19:51:06,017 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 [2021-06-12 19:51:06,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:06,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:06,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088654576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:06,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:51:06,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802484772] [2021-06-12 19:51:06,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:51:06,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:06,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:51:06,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:51:06,132 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) [2021-06-12 19:51:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:06,242 INFO L93 Difference]: Finished difference Result 216 states and 576 transitions. [2021-06-12 19:51:06,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:06,242 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 [2021-06-12 19:51:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:06,243 INFO L225 Difference]: With dead ends: 216 [2021-06-12 19:51:06,243 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:51:06,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:51:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 166. [2021-06-12 19:51:06,248 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) [2021-06-12 19:51:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 492 transitions. [2021-06-12 19:51:06,248 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 492 transitions. Word has length 15 [2021-06-12 19:51:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:06,249 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 492 transitions. [2021-06-12 19:51:06,249 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) [2021-06-12 19:51:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 492 transitions. [2021-06-12 19:51:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:06,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:06,249 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:06,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 19:51:06,450 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1450061836, now seen corresponding path program 5 times [2021-06-12 19:51:06,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:06,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135737361] [2021-06-12 19:51:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:06,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:06,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135737361] [2021-06-12 19:51:06,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135737361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969018241] [2021-06-12 19:51:06,488 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 [2021-06-12 19:51:06,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:06,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969018241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:06,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-12 19:51:06,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413213994] [2021-06-12 19:51:06,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:06,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:06,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:06,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:06,600 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) [2021-06-12 19:51:06,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:06,845 INFO L93 Difference]: Finished difference Result 232 states and 645 transitions. [2021-06-12 19:51:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:06,845 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 [2021-06-12 19:51:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:06,846 INFO L225 Difference]: With dead ends: 232 [2021-06-12 19:51:06,846 INFO L226 Difference]: Without dead ends: 198 [2021-06-12 19:51:06,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:06,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-12 19:51:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-06-12 19:51:06,856 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) [2021-06-12 19:51:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 465 transitions. [2021-06-12 19:51:06,857 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 465 transitions. Word has length 15 [2021-06-12 19:51:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:06,857 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 465 transitions. [2021-06-12 19:51:06,858 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) [2021-06-12 19:51:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 465 transitions. [2021-06-12 19:51:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:06,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:06,858 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:07,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:07,061 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:07,061 INFO L82 PathProgramCache]: Analyzing trace with hash -260492346, now seen corresponding path program 11 times [2021-06-12 19:51:07,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:07,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673457372] [2021-06-12 19:51:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:07,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673457372] [2021-06-12 19:51:07,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673457372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93093867] [2021-06-12 19:51:07,107 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 [2021-06-12 19:51:07,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:07,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:07,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93093867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:07,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:51:07,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173811924] [2021-06-12 19:51:07,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:07,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:07,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:07,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:07,221 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) [2021-06-12 19:51:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:07,350 INFO L93 Difference]: Finished difference Result 214 states and 577 transitions. [2021-06-12 19:51:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:07,350 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 [2021-06-12 19:51:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:07,351 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:51:07,351 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 19:51:07,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 19:51:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 156. [2021-06-12 19:51:07,355 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) [2021-06-12 19:51:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 456 transitions. [2021-06-12 19:51:07,356 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 456 transitions. Word has length 15 [2021-06-12 19:51:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:07,356 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 456 transitions. [2021-06-12 19:51:07,356 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) [2021-06-12 19:51:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 456 transitions. [2021-06-12 19:51:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:07,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:07,357 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:07,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 19:51:07,557 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:07,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:07,558 INFO L82 PathProgramCache]: Analyzing trace with hash 738121340, now seen corresponding path program 6 times [2021-06-12 19:51:07,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:07,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775375646] [2021-06-12 19:51:07,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:07,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:07,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775375646] [2021-06-12 19:51:07,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775375646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779549372] [2021-06-12 19:51:07,587 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 [2021-06-12 19:51:07,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:07,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:07,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779549372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:07,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:51:07,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496908773] [2021-06-12 19:51:07,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:51:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:51:07,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:51:07,653 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) [2021-06-12 19:51:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:07,739 INFO L93 Difference]: Finished difference Result 192 states and 534 transitions. [2021-06-12 19:51:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:07,739 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 [2021-06-12 19:51:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:07,740 INFO L225 Difference]: With dead ends: 192 [2021-06-12 19:51:07,741 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:51:07,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:51:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2021-06-12 19:51:07,744 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) [2021-06-12 19:51:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 401 transitions. [2021-06-12 19:51:07,744 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 401 transitions. Word has length 15 [2021-06-12 19:51:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:07,744 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 401 transitions. [2021-06-12 19:51:07,745 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) [2021-06-12 19:51:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 401 transitions. [2021-06-12 19:51:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:07,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:07,745 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:07,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:07,946 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash -886595830, now seen corresponding path program 5 times [2021-06-12 19:51:07,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:07,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304031201] [2021-06-12 19:51:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:08,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304031201] [2021-06-12 19:51:08,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304031201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622113521] [2021-06-12 19:51:08,003 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 [2021-06-12 19:51:08,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:08,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:08,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:08,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622113521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:51:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139766402] [2021-06-12 19:51:08,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:51:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:51:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:51:08,126 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) [2021-06-12 19:51:08,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:08,249 INFO L93 Difference]: Finished difference Result 165 states and 444 transitions. [2021-06-12 19:51:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:08,249 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 [2021-06-12 19:51:08,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:08,250 INFO L225 Difference]: With dead ends: 165 [2021-06-12 19:51:08,250 INFO L226 Difference]: Without dead ends: 150 [2021-06-12 19:51:08,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-12 19:51:08,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-06-12 19:51:08,253 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) [2021-06-12 19:51:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 397 transitions. [2021-06-12 19:51:08,253 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 397 transitions. Word has length 15 [2021-06-12 19:51:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:08,254 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 397 transitions. [2021-06-12 19:51:08,254 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) [2021-06-12 19:51:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 397 transitions. [2021-06-12 19:51:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:08,254 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:08,254 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:08,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:08,469 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:08,469 INFO L82 PathProgramCache]: Analyzing trace with hash 981607308, now seen corresponding path program 6 times [2021-06-12 19:51:08,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:08,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631242690] [2021-06-12 19:51:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:08,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:08,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631242690] [2021-06-12 19:51:08,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631242690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469338487] [2021-06-12 19:51:08,517 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 [2021-06-12 19:51:08,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:08,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:08,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:08,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469338487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:08,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-12 19:51:08,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107719201] [2021-06-12 19:51:08,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:08,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:08,607 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) [2021-06-12 19:51:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:08,917 INFO L93 Difference]: Finished difference Result 223 states and 580 transitions. [2021-06-12 19:51:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:08,918 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 [2021-06-12 19:51:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:08,919 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:51:08,919 INFO L226 Difference]: Without dead ends: 191 [2021-06-12 19:51:08,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-12 19:51:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 137. [2021-06-12 19:51:08,922 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) [2021-06-12 19:51:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 402 transitions. [2021-06-12 19:51:08,923 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 402 transitions. Word has length 15 [2021-06-12 19:51:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:08,923 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 402 transitions. [2021-06-12 19:51:08,923 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) [2021-06-12 19:51:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 402 transitions. [2021-06-12 19:51:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:08,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:08,924 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:09,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 19:51:09,133 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1341646634, now seen corresponding path program 7 times [2021-06-12 19:51:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:09,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910057957] [2021-06-12 19:51:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:09,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:09,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910057957] [2021-06-12 19:51:09,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910057957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:09,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192457249] [2021-06-12 19:51:09,185 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 [2021-06-12 19:51:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:09,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:09,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:09,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192457249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:09,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:09,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:09,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355432497] [2021-06-12 19:51:09,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:09,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:09,317 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) [2021-06-12 19:51:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:09,422 INFO L93 Difference]: Finished difference Result 182 states and 485 transitions. [2021-06-12 19:51:09,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:09,423 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 [2021-06-12 19:51:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:09,423 INFO L225 Difference]: With dead ends: 182 [2021-06-12 19:51:09,423 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:51:09,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:51:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2021-06-12 19:51:09,427 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) [2021-06-12 19:51:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 414 transitions. [2021-06-12 19:51:09,427 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 414 transitions. Word has length 15 [2021-06-12 19:51:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:09,427 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 414 transitions. [2021-06-12 19:51:09,427 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) [2021-06-12 19:51:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 414 transitions. [2021-06-12 19:51:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:09,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:09,428 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:09,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 19:51:09,641 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:09,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1273184878, now seen corresponding path program 12 times [2021-06-12 19:51:09,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:09,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946279372] [2021-06-12 19:51:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:09,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946279372] [2021-06-12 19:51:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946279372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203312188] [2021-06-12 19:51:09,682 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 [2021-06-12 19:51:09,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:09,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:09,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:09,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203312188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:09,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:09,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:51:09,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50558968] [2021-06-12 19:51:09,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:09,798 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) [2021-06-12 19:51:09,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:09,918 INFO L93 Difference]: Finished difference Result 222 states and 585 transitions. [2021-06-12 19:51:09,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:09,918 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 [2021-06-12 19:51:09,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:09,919 INFO L225 Difference]: With dead ends: 222 [2021-06-12 19:51:09,919 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:51:09,919 INFO L728 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 [2021-06-12 19:51:09,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:51:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 142. [2021-06-12 19:51:09,923 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) [2021-06-12 19:51:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 425 transitions. [2021-06-12 19:51:09,924 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 425 transitions. Word has length 15 [2021-06-12 19:51:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:09,924 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 425 transitions. [2021-06-12 19:51:09,924 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) [2021-06-12 19:51:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 425 transitions. [2021-06-12 19:51:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:09,925 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:09,925 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:10,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-12 19:51:10,149 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:10,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1876876436, now seen corresponding path program 8 times [2021-06-12 19:51:10,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:10,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839989951] [2021-06-12 19:51:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:10,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839989951] [2021-06-12 19:51:10,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839989951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:10,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718931577] [2021-06-12 19:51:10,195 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 [2021-06-12 19:51:10,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:10,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:10,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718931577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:10,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:10,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:51:10,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387544962] [2021-06-12 19:51:10,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:10,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:10,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:10,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:10,307 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) [2021-06-12 19:51:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:10,407 INFO L93 Difference]: Finished difference Result 172 states and 476 transitions. [2021-06-12 19:51:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:10,408 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 [2021-06-12 19:51:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:10,408 INFO L225 Difference]: With dead ends: 172 [2021-06-12 19:51:10,409 INFO L226 Difference]: Without dead ends: 163 [2021-06-12 19:51:10,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:10,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-06-12 19:51:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2021-06-12 19:51:10,412 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) [2021-06-12 19:51:10,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 421 transitions. [2021-06-12 19:51:10,412 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 421 transitions. Word has length 15 [2021-06-12 19:51:10,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:10,413 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 421 transitions. [2021-06-12 19:51:10,413 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) [2021-06-12 19:51:10,413 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 421 transitions. [2021-06-12 19:51:10,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:10,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:10,413 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:10,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 19:51:10,633 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:10,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:10,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1270559102, now seen corresponding path program 13 times [2021-06-12 19:51:10,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:10,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85528523] [2021-06-12 19:51:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:10,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:10,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85528523] [2021-06-12 19:51:10,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85528523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:10,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068974589] [2021-06-12 19:51:10,675 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 [2021-06-12 19:51:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:10,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:10,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:10,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068974589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:10,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:10,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:51:10,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316078197] [2021-06-12 19:51:10,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:51:10,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:51:10,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:51:10,753 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) [2021-06-12 19:51:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:10,876 INFO L93 Difference]: Finished difference Result 205 states and 556 transitions. [2021-06-12 19:51:10,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:10,876 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 [2021-06-12 19:51:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:10,877 INFO L225 Difference]: With dead ends: 205 [2021-06-12 19:51:10,877 INFO L226 Difference]: Without dead ends: 194 [2021-06-12 19:51:10,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-12 19:51:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 141. [2021-06-12 19:51:10,881 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) [2021-06-12 19:51:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 417 transitions. [2021-06-12 19:51:10,881 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 417 transitions. Word has length 15 [2021-06-12 19:51:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:10,881 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 417 transitions. [2021-06-12 19:51:10,882 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) [2021-06-12 19:51:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 417 transitions. [2021-06-12 19:51:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:10,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:10,882 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:11,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 19:51:11,083 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 647834570, now seen corresponding path program 9 times [2021-06-12 19:51:11,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:11,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914515662] [2021-06-12 19:51:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:11,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914515662] [2021-06-12 19:51:11,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914515662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24880523] [2021-06-12 19:51:11,116 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 [2021-06-12 19:51:11,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:11,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:11,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:11,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24880523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:11,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-12 19:51:11,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816887491] [2021-06-12 19:51:11,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:11,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:11,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:11,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:11,205 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) [2021-06-12 19:51:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:11,454 INFO L93 Difference]: Finished difference Result 220 states and 577 transitions. [2021-06-12 19:51:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:11,455 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 [2021-06-12 19:51:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:11,456 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:51:11,456 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 19:51:11,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:51:11,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 19:51:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 136. [2021-06-12 19:51:11,458 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) [2021-06-12 19:51:11,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 398 transitions. [2021-06-12 19:51:11,458 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 398 transitions. Word has length 15 [2021-06-12 19:51:11,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:11,458 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 398 transitions. [2021-06-12 19:51:11,459 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) [2021-06-12 19:51:11,459 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 398 transitions. [2021-06-12 19:51:11,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:11,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:11,459 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:11,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:11,661 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash 716296326, now seen corresponding path program 14 times [2021-06-12 19:51:11,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:11,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333974983] [2021-06-12 19:51:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:11,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:11,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333974983] [2021-06-12 19:51:11,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333974983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720455493] [2021-06-12 19:51:11,715 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 [2021-06-12 19:51:11,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:11,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:11,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:11,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:11,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720455493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:11,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:11,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:51:11,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469617684] [2021-06-12 19:51:11,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:11,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:11,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:11,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:11,829 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) [2021-06-12 19:51:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:11,938 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-06-12 19:51:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:11,938 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 [2021-06-12 19:51:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:11,939 INFO L225 Difference]: With dead ends: 180 [2021-06-12 19:51:11,939 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:51:11,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:51:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2021-06-12 19:51:11,942 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) [2021-06-12 19:51:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 395 transitions. [2021-06-12 19:51:11,942 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 395 transitions. Word has length 15 [2021-06-12 19:51:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:11,943 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 395 transitions. [2021-06-12 19:51:11,943 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) [2021-06-12 19:51:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 395 transitions. [2021-06-12 19:51:11,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:11,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:11,943 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:12,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 19:51:12,153 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 209950060, now seen corresponding path program 15 times [2021-06-12 19:51:12,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:12,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753209306] [2021-06-12 19:51:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:12,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:12,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753209306] [2021-06-12 19:51:12,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753209306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538630131] [2021-06-12 19:51:12,187 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 [2021-06-12 19:51:12,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:12,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:12,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:12,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538630131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:12,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:51:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101018310] [2021-06-12 19:51:12,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:12,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:12,286 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) [2021-06-12 19:51:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:12,418 INFO L93 Difference]: Finished difference Result 197 states and 527 transitions. [2021-06-12 19:51:12,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:12,419 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 [2021-06-12 19:51:12,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:12,419 INFO L225 Difference]: With dead ends: 197 [2021-06-12 19:51:12,419 INFO L226 Difference]: Without dead ends: 186 [2021-06-12 19:51:12,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:12,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-06-12 19:51:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 134. [2021-06-12 19:51:12,422 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) [2021-06-12 19:51:12,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2021-06-12 19:51:12,422 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 15 [2021-06-12 19:51:12,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:12,422 INFO L482 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2021-06-12 19:51:12,422 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) [2021-06-12 19:51:12,422 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2021-06-12 19:51:12,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:12,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:12,423 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:12,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:12,637 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash 524208692, now seen corresponding path program 10 times [2021-06-12 19:51:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:12,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120227135] [2021-06-12 19:51:12,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:12,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:12,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120227135] [2021-06-12 19:51:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120227135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090929556] [2021-06-12 19:51:12,691 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 [2021-06-12 19:51:12,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:12,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:12,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:12,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090929556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:12,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:51:12,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554471376] [2021-06-12 19:51:12,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:51:12,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:12,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:51:12,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:51:12,795 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) [2021-06-12 19:51:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:12,896 INFO L93 Difference]: Finished difference Result 180 states and 469 transitions. [2021-06-12 19:51:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:12,897 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 [2021-06-12 19:51:12,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:12,899 INFO L225 Difference]: With dead ends: 180 [2021-06-12 19:51:12,899 INFO L226 Difference]: Without dead ends: 172 [2021-06-12 19:51:12,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-12 19:51:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2021-06-12 19:51:12,902 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) [2021-06-12 19:51:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 389 transitions. [2021-06-12 19:51:12,902 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 389 transitions. Word has length 15 [2021-06-12 19:51:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:12,902 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 389 transitions. [2021-06-12 19:51:12,902 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) [2021-06-12 19:51:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 389 transitions. [2021-06-12 19:51:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:12,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:12,903 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:13,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 19:51:13,113 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash 22578118, now seen corresponding path program 11 times [2021-06-12 19:51:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:13,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454091450] [2021-06-12 19:51:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:13,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:13,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:13,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454091450] [2021-06-12 19:51:13,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454091450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:13,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895205959] [2021-06-12 19:51:13,147 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 [2021-06-12 19:51:13,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:13,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:13,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895205959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:13,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:51:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418780439] [2021-06-12 19:51:13,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:51:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:51:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:51:13,226 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) [2021-06-12 19:51:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:13,323 INFO L93 Difference]: Finished difference Result 154 states and 429 transitions. [2021-06-12 19:51:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:13,323 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 [2021-06-12 19:51:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:13,324 INFO L225 Difference]: With dead ends: 154 [2021-06-12 19:51:13,324 INFO L226 Difference]: Without dead ends: 130 [2021-06-12 19:51:13,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-12 19:51:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-06-12 19:51:13,327 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) [2021-06-12 19:51:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 377 transitions. [2021-06-12 19:51:13,327 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 377 transitions. Word has length 15 [2021-06-12 19:51:13,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:13,327 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 377 transitions. [2021-06-12 19:51:13,327 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) [2021-06-12 19:51:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 377 transitions. [2021-06-12 19:51:13,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:13,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:13,328 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:13,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 19:51:13,528 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 212575836, now seen corresponding path program 16 times [2021-06-12 19:51:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:13,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156198417] [2021-06-12 19:51:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:13,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:13,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156198417] [2021-06-12 19:51:13,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156198417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:13,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677488674] [2021-06-12 19:51:13,563 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 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 [2021-06-12 19:51:13,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:13,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:51:13,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:13,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677488674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:13,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:13,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:51:13,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283033419] [2021-06-12 19:51:13,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:51:13,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:13,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:51:13,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:51:13,656 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) [2021-06-12 19:51:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:13,771 INFO L93 Difference]: Finished difference Result 180 states and 499 transitions. [2021-06-12 19:51:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:13,771 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 [2021-06-12 19:51:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:13,772 INFO L225 Difference]: With dead ends: 180 [2021-06-12 19:51:13,772 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 19:51:13,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 19:51:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 119. [2021-06-12 19:51:13,774 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) [2021-06-12 19:51:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 345 transitions. [2021-06-12 19:51:13,775 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 345 transitions. Word has length 15 [2021-06-12 19:51:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:13,775 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 345 transitions. [2021-06-12 19:51:13,775 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) [2021-06-12 19:51:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 345 transitions. [2021-06-12 19:51:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:51:13,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:13,775 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:13,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:13,989 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash 907579970, now seen corresponding path program 1 times [2021-06-12 19:51:13,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:13,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117138867] [2021-06-12 19:51:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:51:14,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117138867] [2021-06-12 19:51:14,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117138867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:14,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020523473] [2021-06-12 19:51:14,024 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 [2021-06-12 19:51:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:14,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:14,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:51:14,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020523473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:14,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:14,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-12 19:51:14,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620189433] [2021-06-12 19:51:14,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:51:14,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:14,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:51:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:51:14,140 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) [2021-06-12 19:51:14,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:14,212 INFO L93 Difference]: Finished difference Result 161 states and 443 transitions. [2021-06-12 19:51:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:14,212 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 [2021-06-12 19:51:14,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:14,213 INFO L225 Difference]: With dead ends: 161 [2021-06-12 19:51:14,213 INFO L226 Difference]: Without dead ends: 148 [2021-06-12 19:51:14,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:14,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-06-12 19:51:14,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-06-12 19:51:14,215 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) [2021-06-12 19:51:14,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 360 transitions. [2021-06-12 19:51:14,215 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 360 transitions. Word has length 16 [2021-06-12 19:51:14,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:14,215 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 360 transitions. [2021-06-12 19:51:14,215 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) [2021-06-12 19:51:14,215 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 360 transitions. [2021-06-12 19:51:14,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:51:14,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:14,215 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:14,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 19:51:14,416 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:14,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:14,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1153279832, now seen corresponding path program 2 times [2021-06-12 19:51:14,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:14,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463727095] [2021-06-12 19:51:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:51:14,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:14,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463727095] [2021-06-12 19:51:14,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463727095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:14,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806926812] [2021-06-12 19:51:14,446 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 [2021-06-12 19:51:14,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:14,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:14,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:51:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:51:14,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806926812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:14,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:14,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:51:14,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614951061] [2021-06-12 19:51:14,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:51:14,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:14,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:51:14,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:51:14,530 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) [2021-06-12 19:51:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:14,613 INFO L93 Difference]: Finished difference Result 156 states and 442 transitions. [2021-06-12 19:51:14,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:51:14,613 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 [2021-06-12 19:51:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:14,614 INFO L225 Difference]: With dead ends: 156 [2021-06-12 19:51:14,614 INFO L226 Difference]: Without dead ends: 143 [2021-06-12 19:51:14,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-12 19:51:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2021-06-12 19:51:14,616 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) [2021-06-12 19:51:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 308 transitions. [2021-06-12 19:51:14,617 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 308 transitions. Word has length 16 [2021-06-12 19:51:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:14,617 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 308 transitions. [2021-06-12 19:51:14,617 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) [2021-06-12 19:51:14,617 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 308 transitions. [2021-06-12 19:51:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:14,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:14,617 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:14,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:14,821 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:14,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:14,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1638627788, now seen corresponding path program 1 times [2021-06-12 19:51:14,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:14,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724055920] [2021-06-12 19:51:14,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:14,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:15,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:15,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724055920] [2021-06-12 19:51:15,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724055920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:15,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759332564] [2021-06-12 19:51:15,148 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 [2021-06-12 19:51:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:15,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:15,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:15,456 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 [2021-06-12 19:51:15,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:15,462 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 17 treesize of output 13 [2021-06-12 19:51:15,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:15,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:15,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:15,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:15,506 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 [2021-06-12 19:51:15,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:15,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:15,515 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 25 treesize of output 19 [2021-06-12 19:51:15,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:15,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:15,575 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. [2021-06-12 19:51:15,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:123, output treesize:111 [2021-06-12 19:51:15,995 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-12 19:51:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,002 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 35 treesize of output 27 [2021-06-12 19:51:16,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:51:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,013 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 18 treesize of output 14 [2021-06-12 19:51:16,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,022 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 17 treesize of output 13 [2021-06-12 19:51:16,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,033 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 28 treesize of output 22 [2021-06-12 19:51:16,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:16,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,042 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 37 treesize of output 29 [2021-06-12 19:51:16,045 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:16,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,054 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 27 treesize of output 21 [2021-06-12 19:51:16,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:16,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,064 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 15 treesize of output 11 [2021-06-12 19:51:16,065 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,072 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 [2021-06-12 19:51:16,074 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,082 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 [2021-06-12 19:51:16,084 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,091 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 27 treesize of output 21 [2021-06-12 19:51:16,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,370 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2021-06-12 19:51:16,372 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-06-12 19:51:16,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,380 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 11 treesize of output 3 [2021-06-12 19:51:16,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,390 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 21 treesize of output 7 [2021-06-12 19:51:16,391 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:16,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,407 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 20 treesize of output 9 [2021-06-12 19:51:16,408 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,416 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 10 treesize of output 5 [2021-06-12 19:51:16,417 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,424 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 9 treesize of output 3 [2021-06-12 19:51:16,425 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,433 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 23 treesize of output 11 [2021-06-12 19:51:16,434 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,441 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 12 treesize of output 5 [2021-06-12 19:51:16,448 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:16,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,465 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 21 treesize of output 7 [2021-06-12 19:51:16,466 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,472 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 21 treesize of output 7 [2021-06-12 19:51:16,473 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:16,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,492 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 24 treesize of output 9 [2021-06-12 19:51:16,493 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,498 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 44 treesize of output 19 [2021-06-12 19:51:16,499 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:16,636 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 19:51:16,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:16,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:51:16,645 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 7 variables, input treesize:419, output treesize:179 [2021-06-12 19:51:16,830 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:51:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:16,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759332564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:16,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:16,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:51:16,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450309664] [2021-06-12 19:51:16,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:16,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:16,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:16,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:16,917 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) [2021-06-12 19:51:17,770 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-12 19:51:18,044 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-06-12 19:51:18,273 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-06-12 19:51:18,511 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-12 19:51:18,800 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 115 [2021-06-12 19:51:19,088 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 106 [2021-06-12 19:51:19,342 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2021-06-12 19:51:19,626 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2021-06-12 19:51:19,898 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 110 [2021-06-12 19:51:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:19,985 INFO L93 Difference]: Finished difference Result 294 states and 803 transitions. [2021-06-12 19:51:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:51:19,985 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 [2021-06-12 19:51:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:19,986 INFO L225 Difference]: With dead ends: 294 [2021-06-12 19:51:19,986 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:51:19,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3190.2ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:51:19,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:51:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-06-12 19:51:19,990 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) [2021-06-12 19:51:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-06-12 19:51:19,990 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 17 [2021-06-12 19:51:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:19,991 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-06-12 19:51:19,991 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) [2021-06-12 19:51:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-06-12 19:51:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:19,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:19,991 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:20,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:20,201 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash -310438566, now seen corresponding path program 2 times [2021-06-12 19:51:20,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:20,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812905366] [2021-06-12 19:51:20,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:20,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812905366] [2021-06-12 19:51:20,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812905366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:20,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062141588] [2021-06-12 19:51:20,488 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 [2021-06-12 19:51:20,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:51:20,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:20,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:20,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:20,910 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 15 treesize of output 11 [2021-06-12 19:51:20,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:20,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:20,916 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 [2021-06-12 19:51:20,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,073 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-06-12 19:51:21,073 INFO L628 ElimStorePlain]: treesize reduction 35, result has 80.7 percent of original size [2021-06-12 19:51:21,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,078 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 17 treesize of output 13 [2021-06-12 19:51:21,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,125 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 27 treesize of output 21 [2021-06-12 19:51:21,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:21,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,130 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 25 treesize of output 19 [2021-06-12 19:51:21,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,184 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. [2021-06-12 19:51:21,185 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:195, output treesize:141 [2021-06-12 19:51:21,449 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_19, array_4, v_prenex_17], 1=[array_0, v_prenex_18, v_prenex_16]} [2021-06-12 19:51:21,454 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 17 treesize of output 13 [2021-06-12 19:51:21,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:21,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,577 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-12 19:51:21,577 INFO L628 ElimStorePlain]: treesize reduction 31, result has 86.1 percent of original size [2021-06-12 19:51:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:21,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:21,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,637 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 27 treesize of output 21 [2021-06-12 19:51:21,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,643 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 29 treesize of output 23 [2021-06-12 19:51:21,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:21,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,655 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 20 treesize of output 16 [2021-06-12 19:51:21,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,720 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 11 treesize of output 3 [2021-06-12 19:51:21,720 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,724 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 21 treesize of output 7 [2021-06-12 19:51:21,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,793 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 11 treesize of output 3 [2021-06-12 19:51:21,794 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,798 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 9 treesize of output 3 [2021-06-12 19:51:21,799 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,862 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 10 treesize of output 5 [2021-06-12 19:51:21,863 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,868 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 [2021-06-12 19:51:21,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,873 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 20 treesize of output 9 [2021-06-12 19:51:21,874 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,878 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 12 treesize of output 5 [2021-06-12 19:51:21,879 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:21,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:51:21,942 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 9 variables, input treesize:237, output treesize:57 [2021-06-12 19:51:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:21,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062141588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:21,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:21,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:51:21,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386974096] [2021-06-12 19:51:21,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:21,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:21,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:21,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:21,996 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) [2021-06-12 19:51:22,359 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 19:51:22,592 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-12 19:51:22,746 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-12 19:51:22,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:22,939 INFO L93 Difference]: Finished difference Result 229 states and 646 transitions. [2021-06-12 19:51:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:22,939 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 [2021-06-12 19:51:22,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:22,940 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:51:22,940 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:51:22,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1190.4ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:51:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:51:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 148. [2021-06-12 19:51:22,943 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) [2021-06-12 19:51:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 429 transitions. [2021-06-12 19:51:22,943 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 429 transitions. Word has length 17 [2021-06-12 19:51:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:22,944 INFO L482 AbstractCegarLoop]: Abstraction has 148 states and 429 transitions. [2021-06-12 19:51:22,944 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) [2021-06-12 19:51:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 429 transitions. [2021-06-12 19:51:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:22,944 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:22,944 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-12 19:51:23,161 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1170799304, now seen corresponding path program 3 times [2021-06-12 19:51:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989093892] [2021-06-12 19:51:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:23,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:23,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989093892] [2021-06-12 19:51:23,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989093892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:23,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836272812] [2021-06-12 19:51:23,505 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 [2021-06-12 19:51:23,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:23,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:23,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:51:23,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,125 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 [2021-06-12 19:51:24,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,133 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 17 treesize of output 13 [2021-06-12 19:51:24,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:24,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,198 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 [2021-06-12 19:51:24,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:51:24,217 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:24,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,284 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 [2021-06-12 19:51:24,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,291 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 27 treesize of output 21 [2021-06-12 19:51:24,292 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:24,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:24,365 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. [2021-06-12 19:51:24,365 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-12 19:51:24,642 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]} [2021-06-12 19:51:24,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:24,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,657 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 21 treesize of output 17 [2021-06-12 19:51:24,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:24,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:24,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,908 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2021-06-12 19:51:24,908 INFO L628 ElimStorePlain]: treesize reduction 141, result has 58.0 percent of original size [2021-06-12 19:51:24,913 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 19 treesize of output 15 [2021-06-12 19:51:24,914 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:24,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:24,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,021 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 [2021-06-12 19:51:25,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:25,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:25,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,131 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 24 treesize of output 9 [2021-06-12 19:51:25,131 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,137 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 [2021-06-12 19:51:25,138 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,142 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 [2021-06-12 19:51:25,143 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,146 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 11 treesize of output 3 [2021-06-12 19:51:25,147 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,193 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:25,193 INFO L518 ElimStorePlain]: Eliminatee v_prenex_35 vanished before elimination [2021-06-12 19:51:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,205 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 10 treesize of output 5 [2021-06-12 19:51:25,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,209 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 20 treesize of output 9 [2021-06-12 19:51:25,210 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,277 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 11 treesize of output 3 [2021-06-12 19:51:25,278 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:51:25,324 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 15 variables, input treesize:364, output treesize:62 [2021-06-12 19:51:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836272812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:25,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:25,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112348885] [2021-06-12 19:51:25,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:25,386 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) [2021-06-12 19:51:25,720 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 19:51:25,903 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-12 19:51:26,165 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 118 [2021-06-12 19:51:26,297 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-06-12 19:51:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:26,349 INFO L93 Difference]: Finished difference Result 228 states and 644 transitions. [2021-06-12 19:51:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:26,349 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 [2021-06-12 19:51:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:26,350 INFO L225 Difference]: With dead ends: 228 [2021-06-12 19:51:26,350 INFO L226 Difference]: Without dead ends: 224 [2021-06-12 19:51:26,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1396.3ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-12 19:51:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 152. [2021-06-12 19:51:26,353 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) [2021-06-12 19:51:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 439 transitions. [2021-06-12 19:51:26,353 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 439 transitions. Word has length 17 [2021-06-12 19:51:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:26,353 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 439 transitions. [2021-06-12 19:51:26,353 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) [2021-06-12 19:51:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 439 transitions. [2021-06-12 19:51:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:26,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:26,354 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:26,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:26,557 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:26,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:26,557 INFO L82 PathProgramCache]: Analyzing trace with hash 227417012, now seen corresponding path program 4 times [2021-06-12 19:51:26,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:26,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635453006] [2021-06-12 19:51:26,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:26,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:26,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635453006] [2021-06-12 19:51:26,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635453006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:26,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500350549] [2021-06-12 19:51:26,787 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 [2021-06-12 19:51:26,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:26,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:26,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,066 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 15 treesize of output 11 [2021-06-12 19:51:27,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,071 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 17 treesize of output 13 [2021-06-12 19:51:27,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:27,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,129 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 [2021-06-12 19:51:27,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:27,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,135 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 [2021-06-12 19:51:27,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:27,194 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. [2021-06-12 19:51:27,194 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-12 19:51:27,476 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:51:27,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,482 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 [2021-06-12 19:51:27,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,492 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 28 treesize of output 22 [2021-06-12 19:51:27,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:27,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,500 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 18 treesize of output 14 [2021-06-12 19:51:27,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,507 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 25 treesize of output 19 [2021-06-12 19:51:27,508 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,514 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 27 treesize of output 21 [2021-06-12 19:51:27,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,522 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 27 treesize of output 21 [2021-06-12 19:51:27,524 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:27,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,531 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 37 treesize of output 29 [2021-06-12 19:51:27,538 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,549 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 17 treesize of output 13 [2021-06-12 19:51:27,550 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,557 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 25 treesize of output 19 [2021-06-12 19:51:27,558 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,562 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 35 treesize of output 27 [2021-06-12 19:51:27,564 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-06-12 19:51:27,797 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-12 19:51:27,797 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-12 19:51:27,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,803 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 11 treesize of output 3 [2021-06-12 19:51:27,803 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,808 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 21 treesize of output 7 [2021-06-12 19:51:27,808 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,822 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 10 treesize of output 5 [2021-06-12 19:51:27,823 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,828 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 11 treesize of output 3 [2021-06-12 19:51:27,829 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,834 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 21 treesize of output 7 [2021-06-12 19:51:27,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,857 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 23 treesize of output 11 [2021-06-12 19:51:27,858 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,865 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 12 treesize of output 5 [2021-06-12 19:51:27,865 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:27,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,882 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 44 treesize of output 19 [2021-06-12 19:51:27,883 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,889 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 24 treesize of output 9 [2021-06-12 19:51:27,890 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,911 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 20 treesize of output 9 [2021-06-12 19:51:27,912 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,916 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 9 treesize of output 3 [2021-06-12 19:51:27,917 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:28,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:51:28,016 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-12 19:51:28,172 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:51:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:28,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500350549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:28,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:28,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:51:28,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276500402] [2021-06-12 19:51:28,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:28,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:28,249 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) [2021-06-12 19:51:29,149 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2021-06-12 19:51:29,303 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91 [2021-06-12 19:51:29,474 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 19:51:29,670 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 19:51:29,820 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 19:51:30,001 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-12 19:51:30,204 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 19:51:30,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:30,264 INFO L93 Difference]: Finished difference Result 261 states and 746 transitions. [2021-06-12 19:51:30,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:51:30,264 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 [2021-06-12 19:51:30,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:30,265 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:51:30,265 INFO L226 Difference]: Without dead ends: 257 [2021-06-12 19:51:30,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2166.9ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:51:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-12 19:51:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 158. [2021-06-12 19:51:30,269 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) [2021-06-12 19:51:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 457 transitions. [2021-06-12 19:51:30,269 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 457 transitions. Word has length 17 [2021-06-12 19:51:30,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:30,270 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 457 transitions. [2021-06-12 19:51:30,270 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) [2021-06-12 19:51:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 457 transitions. [2021-06-12 19:51:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:30,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:30,270 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:30,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:30,485 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1708654882, now seen corresponding path program 5 times [2021-06-12 19:51:30,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:30,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117006520] [2021-06-12 19:51:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:30,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:30,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117006520] [2021-06-12 19:51:30,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117006520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:30,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868202803] [2021-06-12 19:51:30,733 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 [2021-06-12 19:51:30,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:30,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:30,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:31,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,008 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 25 treesize of output 19 [2021-06-12 19:51:31,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,015 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 25 treesize of output 19 [2021-06-12 19:51:31,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:31,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,026 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 35 treesize of output 27 [2021-06-12 19:51:31,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:51:31,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:31,126 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. [2021-06-12 19:51:31,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:175, output treesize:235 [2021-06-12 19:51:31,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,371 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 30 treesize of output 24 [2021-06-12 19:51:31,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,380 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 28 treesize of output 22 [2021-06-12 19:51:31,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,390 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 46 treesize of output 36 [2021-06-12 19:51:31,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,399 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 30 treesize of output 24 [2021-06-12 19:51:31,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,409 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 48 treesize of output 38 [2021-06-12 19:51:31,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:51:31,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,428 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 28 treesize of output 22 [2021-06-12 19:51:31,429 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,436 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 30 treesize of output 24 [2021-06-12 19:51:31,446 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,683 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-12 19:51:31,683 INFO L628 ElimStorePlain]: treesize reduction 238, result has 53.4 percent of original size [2021-06-12 19:51:31,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:31,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:31,785 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 [2021-06-12 19:51:31,786 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:31,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:31,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,872 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 11 treesize of output 3 [2021-06-12 19:51:31,882 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,887 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 21 treesize of output 7 [2021-06-12 19:51:31,887 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:31,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:31,974 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:51:31,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,979 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 12 treesize of output 5 [2021-06-12 19:51:31,979 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,985 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 44 treesize of output 19 [2021-06-12 19:51:31,986 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,990 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 12 treesize of output 5 [2021-06-12 19:51:31,990 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,994 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 11 treesize of output 3 [2021-06-12 19:51:31,995 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,998 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 21 treesize of output 7 [2021-06-12 19:51:31,999 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:32,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:32,077 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 [2021-06-12 19:51:32,078 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:32,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:32,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:32,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:32,164 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 [2021-06-12 19:51:32,165 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:32,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:32,169 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 20 treesize of output 9 [2021-06-12 19:51:32,170 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:32,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:32,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:32,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:51:32,256 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-06-12 19:51:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868202803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:32,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:32,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:32,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024247406] [2021-06-12 19:51:32,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:32,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:32,411 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) [2021-06-12 19:51:33,309 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2021-06-12 19:51:33,650 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 107 [2021-06-12 19:51:33,826 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-06-12 19:51:34,020 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 19:51:34,242 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 19:51:34,449 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-06-12 19:51:34,670 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 19:51:34,896 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-06-12 19:51:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:34,959 INFO L93 Difference]: Finished difference Result 275 states and 766 transitions. [2021-06-12 19:51:34,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:51:34,960 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 [2021-06-12 19:51:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:34,961 INFO L225 Difference]: With dead ends: 275 [2021-06-12 19:51:34,961 INFO L226 Difference]: Without dead ends: 267 [2021-06-12 19:51:34,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2558.7ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:51:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-12 19:51:34,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 161. [2021-06-12 19:51:34,964 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) [2021-06-12 19:51:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 469 transitions. [2021-06-12 19:51:34,964 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 469 transitions. Word has length 17 [2021-06-12 19:51:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:34,964 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 469 transitions. [2021-06-12 19:51:34,964 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) [2021-06-12 19:51:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 469 transitions. [2021-06-12 19:51:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:34,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:34,965 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:35,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:35,185 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1137200076, now seen corresponding path program 6 times [2021-06-12 19:51:35,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:35,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240692565] [2021-06-12 19:51:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:35,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:35,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240692565] [2021-06-12 19:51:35,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240692565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:35,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750869239] [2021-06-12 19:51:35,405 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 [2021-06-12 19:51:35,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:35,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:35,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:35,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,686 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 25 treesize of output 19 [2021-06-12 19:51:35,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,691 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 27 treesize of output 21 [2021-06-12 19:51:35,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:35,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:35,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,747 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 17 treesize of output 13 [2021-06-12 19:51:35,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,752 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 15 treesize of output 11 [2021-06-12 19:51:35,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:35,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,804 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 15 treesize of output 11 [2021-06-12 19:51:35,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,815 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 17 treesize of output 13 [2021-06-12 19:51:35,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:35,864 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. [2021-06-12 19:51:35,865 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:169, output treesize:145 [2021-06-12 19:51:36,191 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]} [2021-06-12 19:51:36,201 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 21 treesize of output 17 [2021-06-12 19:51:36,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,209 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 19 treesize of output 15 [2021-06-12 19:51:36,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,444 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-06-12 19:51:36,444 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.6 percent of original size [2021-06-12 19:51:36,454 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 19 treesize of output 15 [2021-06-12 19:51:36,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:36,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,591 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 7 treesize of output 5 [2021-06-12 19:51:36,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,654 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 27 treesize of output 21 [2021-06-12 19:51:36,655 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:36,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,715 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 30 treesize of output 24 [2021-06-12 19:51:36,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,721 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 [2021-06-12 19:51:36,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,778 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 [2021-06-12 19:51:36,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,784 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 12 treesize of output 5 [2021-06-12 19:51:36,785 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,841 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 24 treesize of output 9 [2021-06-12 19:51:36,842 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,847 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 21 treesize of output 7 [2021-06-12 19:51:36,848 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,898 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:36,898 INFO L518 ElimStorePlain]: Eliminatee v_prenex_63 vanished before elimination [2021-06-12 19:51:36,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,902 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 11 treesize of output 3 [2021-06-12 19:51:36,902 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,960 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 10 treesize of output 5 [2021-06-12 19:51:36,961 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,966 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 20 treesize of output 9 [2021-06-12 19:51:36,967 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:37,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:37,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:51:37,023 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-12 19:51:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:37,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750869239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:37,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:37,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:37,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614341501] [2021-06-12 19:51:37,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:37,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:37,071 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) [2021-06-12 19:51:37,755 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 101 [2021-06-12 19:51:38,386 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 134 [2021-06-12 19:51:38,731 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-12 19:51:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:38,822 INFO L93 Difference]: Finished difference Result 281 states and 779 transitions. [2021-06-12 19:51:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:38,822 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 [2021-06-12 19:51:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:38,823 INFO L225 Difference]: With dead ends: 281 [2021-06-12 19:51:38,823 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 19:51:38,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1841.4ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 19:51:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2021-06-12 19:51:38,826 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) [2021-06-12 19:51:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 484 transitions. [2021-06-12 19:51:38,827 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 484 transitions. Word has length 17 [2021-06-12 19:51:38,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:38,827 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 484 transitions. [2021-06-12 19:51:38,827 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) [2021-06-12 19:51:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 484 transitions. [2021-06-12 19:51:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:38,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:38,828 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:39,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-12 19:51:39,052 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:39,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1272047358, now seen corresponding path program 7 times [2021-06-12 19:51:39,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:39,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804015507] [2021-06-12 19:51:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:39,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804015507] [2021-06-12 19:51:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804015507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79516298] [2021-06-12 19:51:39,371 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 [2021-06-12 19:51:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:39,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:39,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,565 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 [2021-06-12 19:51:39,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,570 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 [2021-06-12 19:51:39,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:39,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:39,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,631 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 [2021-06-12 19:51:39,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,635 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 [2021-06-12 19:51:39,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:39,690 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. [2021-06-12 19:51:39,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-12 19:51:39,977 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:51:39,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,985 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 15 treesize of output 11 [2021-06-12 19:51:39,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,991 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 18 treesize of output 14 [2021-06-12 19:51:39,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,997 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 28 treesize of output 22 [2021-06-12 19:51:39,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:40,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,003 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 27 treesize of output 21 [2021-06-12 19:51:40,004 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,009 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 [2021-06-12 19:51:40,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,014 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 37 treesize of output 29 [2021-06-12 19:51:40,016 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:40,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:51:40,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:40,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,027 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 35 treesize of output 27 [2021-06-12 19:51:40,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 19:51:40,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,034 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 17 treesize of output 13 [2021-06-12 19:51:40,035 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,046 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 [2021-06-12 19:51:40,048 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,281 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-12 19:51:40,281 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-12 19:51:40,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,286 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 44 treesize of output 19 [2021-06-12 19:51:40,287 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,292 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 24 treesize of output 9 [2021-06-12 19:51:40,292 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:40,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,309 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 20 treesize of output 9 [2021-06-12 19:51:40,310 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,315 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 21 treesize of output 7 [2021-06-12 19:51:40,315 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,320 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 [2021-06-12 19:51:40,326 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,339 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 21 treesize of output 7 [2021-06-12 19:51:40,340 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,345 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 11 treesize of output 3 [2021-06-12 19:51:40,345 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:40,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,360 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 10 treesize of output 5 [2021-06-12 19:51:40,360 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,370 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 23 treesize of output 11 [2021-06-12 19:51:40,371 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,376 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 12 treesize of output 5 [2021-06-12 19:51:40,376 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:40,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,388 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 9 treesize of output 3 [2021-06-12 19:51:40,389 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:40,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:51:40,499 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-12 19:51:40,648 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:51:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:40,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79516298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:40,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:40,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:51:40,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883667733] [2021-06-12 19:51:40,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:40,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:40,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:40,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:40,705 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) [2021-06-12 19:51:41,308 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-12 19:51:41,495 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 19:51:41,668 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-12 19:51:41,894 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-12 19:51:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:41,963 INFO L93 Difference]: Finished difference Result 290 states and 824 transitions. [2021-06-12 19:51:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:51:41,964 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 [2021-06-12 19:51:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:41,965 INFO L225 Difference]: With dead ends: 290 [2021-06-12 19:51:41,965 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:51:41,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1455.2ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:51:41,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 170. [2021-06-12 19:51:41,968 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) [2021-06-12 19:51:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 493 transitions. [2021-06-12 19:51:41,969 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 493 transitions. Word has length 17 [2021-06-12 19:51:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:41,969 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 493 transitions. [2021-06-12 19:51:41,969 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) [2021-06-12 19:51:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 493 transitions. [2021-06-12 19:51:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:41,970 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:41,970 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:42,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 19:51:42,177 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1541682068, now seen corresponding path program 8 times [2021-06-12 19:51:42,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:42,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529635058] [2021-06-12 19:51:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:42,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529635058] [2021-06-12 19:51:42,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529635058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:42,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830285710] [2021-06-12 19:51:42,382 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 [2021-06-12 19:51:42,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:42,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:42,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:42,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,615 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 25 treesize of output 19 [2021-06-12 19:51:42,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,622 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 [2021-06-12 19:51:42,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,628 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 [2021-06-12 19:51:42,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,637 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 35 treesize of output 27 [2021-06-12 19:51:42,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:51:42,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:42,732 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. [2021-06-12 19:51:42,732 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:239 [2021-06-12 19:51:42,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,960 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 15 treesize of output 11 [2021-06-12 19:51:42,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:51:42,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,215 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 84 [2021-06-12 19:51:43,216 INFO L628 ElimStorePlain]: treesize reduction 196, result has 65.9 percent of original size [2021-06-12 19:51:43,220 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 27 treesize of output 21 [2021-06-12 19:51:43,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:43,337 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 19:51:43,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,343 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 21 treesize of output 7 [2021-06-12 19:51:43,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,348 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 [2021-06-12 19:51:43,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,462 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 19:51:43,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,467 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 27 treesize of output 21 [2021-06-12 19:51:43,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:43,576 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 19:51:43,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,581 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 28 treesize of output 22 [2021-06-12 19:51:43,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,588 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 30 treesize of output 24 [2021-06-12 19:51:43,589 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,594 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 28 treesize of output 22 [2021-06-12 19:51:43,595 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,604 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 48 treesize of output 38 [2021-06-12 19:51:43,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,610 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 30 treesize of output 24 [2021-06-12 19:51:43,612 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:51:43,616 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,784 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-12 19:51:43,784 INFO L628 ElimStorePlain]: treesize reduction 21, result has 93.0 percent of original size [2021-06-12 19:51:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,789 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 20 treesize of output 9 [2021-06-12 19:51:43,790 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,794 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 10 treesize of output 5 [2021-06-12 19:51:43,795 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,895 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 12 treesize of output 5 [2021-06-12 19:51:43,896 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:51:43,901 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,906 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 21 treesize of output 7 [2021-06-12 19:51:43,907 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,913 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 12 treesize of output 5 [2021-06-12 19:51:43,914 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,917 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 [2021-06-12 19:51:43,918 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:43,995 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-06-12 19:51:43,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:51:43,998 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:621, output treesize:139 [2021-06-12 19:51:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:44,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830285710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:44,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:44,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:44,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459835273] [2021-06-12 19:51:44,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:44,160 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) [2021-06-12 19:51:44,734 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-06-12 19:51:44,960 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-12 19:51:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:45,033 INFO L93 Difference]: Finished difference Result 272 states and 776 transitions. [2021-06-12 19:51:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:51:45,034 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 [2021-06-12 19:51:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:45,035 INFO L225 Difference]: With dead ends: 272 [2021-06-12 19:51:45,035 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 19:51:45,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 993.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:51:45,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 19:51:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 167. [2021-06-12 19:51:45,038 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) [2021-06-12 19:51:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-06-12 19:51:45,039 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-06-12 19:51:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:45,039 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-06-12 19:51:45,039 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) [2021-06-12 19:51:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-06-12 19:51:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:45,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:45,039 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:45,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:45,253 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash -598492624, now seen corresponding path program 9 times [2021-06-12 19:51:45,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:45,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843544756] [2021-06-12 19:51:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:45,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843544756] [2021-06-12 19:51:45,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843544756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244588467] [2021-06-12 19:51:45,469 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 [2021-06-12 19:51:45,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:45,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:51:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:45,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,705 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 25 treesize of output 19 [2021-06-12 19:51:45,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,711 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 15 treesize of output 11 [2021-06-12 19:51:45,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,717 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 25 treesize of output 19 [2021-06-12 19:51:45,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,723 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 35 treesize of output 27 [2021-06-12 19:51:45,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:51:45,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:45,816 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. [2021-06-12 19:51:45,817 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:171, output treesize:231 [2021-06-12 19:51:46,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,182 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 [2021-06-12 19:51:46,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:51:46,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,495 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 132 [2021-06-12 19:51:46,496 INFO L628 ElimStorePlain]: treesize reduction 198, result has 65.9 percent of original size [2021-06-12 19:51:46,496 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:51:46,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,502 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 27 treesize of output 21 [2021-06-12 19:51:46,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:46,632 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 19:51:46,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:46,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,639 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 [2021-06-12 19:51:46,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,646 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 [2021-06-12 19:51:46,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:46,777 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-12 19:51:46,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:46,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,784 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 28 treesize of output 22 [2021-06-12 19:51:46,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:51:46,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,016 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2021-06-12 19:51:47,017 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.2 percent of original size [2021-06-12 19:51:47,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,023 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 48 treesize of output 38 [2021-06-12 19:51:47,024 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,131 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-06-12 19:51:47,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:47,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,138 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 12 treesize of output 5 [2021-06-12 19:51:47,139 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,145 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 21 treesize of output 7 [2021-06-12 19:51:47,146 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,271 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 19:51:47,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,279 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 28 treesize of output 22 [2021-06-12 19:51:47,280 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,285 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 30 treesize of output 24 [2021-06-12 19:51:47,290 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,485 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 107 [2021-06-12 19:51:47,486 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.5 percent of original size [2021-06-12 19:51:47,498 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 [2021-06-12 19:51:47,499 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:47,600 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 19:51:47,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,606 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 [2021-06-12 19:51:47,606 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,611 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 [2021-06-12 19:51:47,612 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:47,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:47,724 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 44 treesize of output 19 [2021-06-12 19:51:47,724 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,825 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 19:51:47,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:47,830 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 30 treesize of output 24 [2021-06-12 19:51:47,831 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,014 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-12 19:51:48,015 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.0 percent of original size [2021-06-12 19:51:48,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,019 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 12 treesize of output 5 [2021-06-12 19:51:48,020 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:48,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,114 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 [2021-06-12 19:51:48,114 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,119 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 [2021-06-12 19:51:48,119 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:48,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 14 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:51:48,220 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 21 variables, input treesize:629, output treesize:167 [2021-06-12 19:51:48,374 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-06-12 19:51:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:48,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244588467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:48,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:48,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:48,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244323333] [2021-06-12 19:51:48,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:48,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:48,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:48,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:48,530 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) [2021-06-12 19:51:49,171 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 107 [2021-06-12 19:51:49,532 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2021-06-12 19:51:49,960 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 115 [2021-06-12 19:51:50,266 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 125 [2021-06-12 19:51:50,619 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 135 [2021-06-12 19:51:50,974 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 132 [2021-06-12 19:51:51,337 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 138 [2021-06-12 19:51:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:51,429 INFO L93 Difference]: Finished difference Result 379 states and 1027 transitions. [2021-06-12 19:51:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:51,429 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 [2021-06-12 19:51:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:51,434 INFO L225 Difference]: With dead ends: 379 [2021-06-12 19:51:51,434 INFO L226 Difference]: Without dead ends: 367 [2021-06-12 19:51:51,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 3004.6ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:51:51,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-12 19:51:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 168. [2021-06-12 19:51:51,438 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) [2021-06-12 19:51:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 496 transitions. [2021-06-12 19:51:51,439 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 496 transitions. Word has length 17 [2021-06-12 19:51:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:51,439 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 496 transitions. [2021-06-12 19:51:51,439 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) [2021-06-12 19:51:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 496 transitions. [2021-06-12 19:51:51,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:51,440 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:51,440 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:51,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 19:51:51,663 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1539622738, now seen corresponding path program 10 times [2021-06-12 19:51:51,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:51,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903289666] [2021-06-12 19:51:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:51,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:51,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903289666] [2021-06-12 19:51:51,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903289666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:51,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839868534] [2021-06-12 19:51:51,950 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 [2021-06-12 19:51:51,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:51,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:51:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:52,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,325 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 17 treesize of output 13 [2021-06-12 19:51:52,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,330 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 [2021-06-12 19:51:52,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:52,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,395 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 [2021-06-12 19:51:52,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,400 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 27 treesize of output 21 [2021-06-12 19:51:52,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:52,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:52,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,466 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 [2021-06-12 19:51:52,466 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,470 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 [2021-06-12 19:51:52,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:52,539 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. [2021-06-12 19:51:52,539 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-06-12 19:51:52,843 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]} [2021-06-12 19:51:52,849 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 25 treesize of output 19 [2021-06-12 19:51:52,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,856 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 15 treesize of output 11 [2021-06-12 19:51:52,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,047 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-12 19:51:53,048 INFO L628 ElimStorePlain]: treesize reduction 137, result has 61.8 percent of original size [2021-06-12 19:51:53,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:53,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:53,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,143 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 [2021-06-12 19:51:53,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:53,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:53,307 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:53,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,318 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 19 treesize of output 15 [2021-06-12 19:51:53,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:53,326 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_118 vanished before elimination [2021-06-12 19:51:53,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,396 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 10 treesize of output 5 [2021-06-12 19:51:53,397 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,401 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 20 treesize of output 9 [2021-06-12 19:51:53,402 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,474 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-06-12 19:51:53,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,478 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 11 treesize of output 3 [2021-06-12 19:51:53,478 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,531 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 21 treesize of output 7 [2021-06-12 19:51:53,531 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,535 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 11 treesize of output 3 [2021-06-12 19:51:53,536 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:51:53,540 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,545 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 24 treesize of output 9 [2021-06-12 19:51:53,545 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:53,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:51:53,593 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-06-12 19:51:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:53,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839868534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:53,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:53,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:51:53,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824497521] [2021-06-12 19:51:53,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:53,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:53,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:53,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:53,646 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) [2021-06-12 19:51:54,432 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-12 19:51:54,851 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 109 [2021-06-12 19:51:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:55,001 INFO L93 Difference]: Finished difference Result 276 states and 775 transitions. [2021-06-12 19:51:55,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:51:55,001 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 [2021-06-12 19:51:55,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:55,002 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:51:55,003 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 19:51:55,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1554.1ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:51:55,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 19:51:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 165. [2021-06-12 19:51:55,006 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) [2021-06-12 19:51:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 487 transitions. [2021-06-12 19:51:55,006 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 487 transitions. Word has length 17 [2021-06-12 19:51:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:55,006 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 487 transitions. [2021-06-12 19:51:55,007 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) [2021-06-12 19:51:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 487 transitions. [2021-06-12 19:51:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:51:55,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:55,007 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:55,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-12 19:51:55,217 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1020683452, now seen corresponding path program 11 times [2021-06-12 19:51:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:55,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876238040] [2021-06-12 19:51:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:55,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876238040] [2021-06-12 19:51:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876238040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:55,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169349067] [2021-06-12 19:51:55,400 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 [2021-06-12 19:51:55,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:55,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:51:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:55,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,526 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 27 treesize of output 21 [2021-06-12 19:51:55,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:55,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,532 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 [2021-06-12 19:51:55,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:55,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,537 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 [2021-06-12 19:51:55,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:55,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,542 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 17 treesize of output 13 [2021-06-12 19:51:55,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:55,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:55,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:51:55,601 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:51:56,229 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]} [2021-06-12 19:51:56,236 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 19 treesize of output 15 [2021-06-12 19:51:56,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:56,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,487 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2021-06-12 19:51:56,487 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.6 percent of original size [2021-06-12 19:51:56,492 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 30 treesize of output 24 [2021-06-12 19:51:56,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:56,498 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,551 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 27 treesize of output 21 [2021-06-12 19:51:56,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:51:56,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,623 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 19 treesize of output 15 [2021-06-12 19:51:56,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:51:56,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,771 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 7 treesize of output 5 [2021-06-12 19:51:56,772 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,842 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 12 treesize of output 5 [2021-06-12 19:51:56,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,848 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 [2021-06-12 19:51:56,849 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,912 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 24 treesize of output 9 [2021-06-12 19:51:56,912 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,917 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 [2021-06-12 19:51:56,918 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:56,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,971 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 10 treesize of output 5 [2021-06-12 19:51:56,972 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,975 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 20 treesize of output 9 [2021-06-12 19:51:56,976 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:57,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:57,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:57,035 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 11 treesize of output 3 [2021-06-12 19:51:57,036 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:57,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-12 19:51:57,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-12 19:51:57,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:51:57,085 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-12 19:51:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:57,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169349067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:57,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:57,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:51:57,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421657177] [2021-06-12 19:51:57,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:51:57,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:57,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:51:57,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:57,140 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) [2021-06-12 19:51:57,645 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-12 19:51:57,987 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 96 [2021-06-12 19:51:58,237 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-12 19:51:58,809 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 131 [2021-06-12 19:51:59,204 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 111 [2021-06-12 19:51:59,434 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-12 19:51:59,839 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2021-06-12 19:52:00,205 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 103 [2021-06-12 19:52:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:00,321 INFO L93 Difference]: Finished difference Result 339 states and 928 transitions. [2021-06-12 19:52:00,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:00,321 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 [2021-06-12 19:52:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:00,323 INFO L225 Difference]: With dead ends: 339 [2021-06-12 19:52:00,323 INFO L226 Difference]: Without dead ends: 331 [2021-06-12 19:52:00,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3285.4ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-12 19:52:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 161. [2021-06-12 19:52:00,326 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) [2021-06-12 19:52:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 471 transitions. [2021-06-12 19:52:00,326 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 471 transitions. Word has length 17 [2021-06-12 19:52:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:00,327 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 471 transitions. [2021-06-12 19:52:00,327 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) [2021-06-12 19:52:00,327 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 471 transitions. [2021-06-12 19:52:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:00,327 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:00,327 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:00,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-12 19:52:00,533 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:00,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:00,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1496339310, now seen corresponding path program 12 times [2021-06-12 19:52:00,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:00,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827458096] [2021-06-12 19:52:00,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:00,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:00,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827458096] [2021-06-12 19:52:00,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827458096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:00,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900802019] [2021-06-12 19:52:00,771 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 [2021-06-12 19:52:00,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:52:00,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:52:00,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:00,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:00,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:00,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:01,086 INFO L628 ElimStorePlain]: treesize reduction 32, result has 82.1 percent of original size [2021-06-12 19:52:01,088 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 17 treesize of output 13 [2021-06-12 19:52:01,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,130 INFO L628 ElimStorePlain]: treesize reduction 82, result has 41.4 percent of original size [2021-06-12 19:52:01,131 INFO L518 ElimStorePlain]: Eliminatee v_prenex_139 vanished before elimination [2021-06-12 19:52:01,133 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. [2021-06-12 19:52:01,133 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:177, output treesize:58 [2021-06-12 19:52:01,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,264 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 [2021-06-12 19:52:01,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,269 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 27 treesize of output 21 [2021-06-12 19:52:01,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:01,349 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-06-12 19:52:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,353 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 11 treesize of output 3 [2021-06-12 19:52:01,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,367 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 21 treesize of output 7 [2021-06-12 19:52:01,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:01,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:01,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,431 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 18 treesize of output 14 [2021-06-12 19:52:01,432 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,435 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 20 treesize of output 16 [2021-06-12 19:52:01,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:01,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,471 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 10 treesize of output 5 [2021-06-12 19:52:01,472 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,476 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 12 treesize of output 5 [2021-06-12 19:52:01,476 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:01,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,511 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 17 treesize of output 13 [2021-06-12 19:52:01,512 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,515 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 19 treesize of output 15 [2021-06-12 19:52:01,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,549 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 9 treesize of output 3 [2021-06-12 19:52:01,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:52:01,553 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:01,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:52:01,581 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-06-12 19:52:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900802019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:01,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:01,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:52:01,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71010482] [2021-06-12 19:52:01,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:01,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:01,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:01,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:01,625 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) [2021-06-12 19:52:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:02,219 INFO L93 Difference]: Finished difference Result 223 states and 624 transitions. [2021-06-12 19:52:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:02,219 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 [2021-06-12 19:52:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:02,220 INFO L225 Difference]: With dead ends: 223 [2021-06-12 19:52:02,220 INFO L226 Difference]: Without dead ends: 219 [2021-06-12 19:52:02,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 740.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:52:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-12 19:52:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 168. [2021-06-12 19:52:02,224 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) [2021-06-12 19:52:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 492 transitions. [2021-06-12 19:52:02,224 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 492 transitions. Word has length 17 [2021-06-12 19:52:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:02,224 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 492 transitions. [2021-06-12 19:52:02,224 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) [2021-06-12 19:52:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 492 transitions. [2021-06-12 19:52:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:02,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:02,225 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:02,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:02,437 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:02,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:02,437 INFO L82 PathProgramCache]: Analyzing trace with hash 849561632, now seen corresponding path program 13 times [2021-06-12 19:52:02,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:02,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473276186] [2021-06-12 19:52:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:02,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:02,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473276186] [2021-06-12 19:52:02,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473276186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:02,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398891604] [2021-06-12 19:52:02,748 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 [2021-06-12 19:52:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:02,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:02,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,993 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 [2021-06-12 19:52:02,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:02,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,998 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 17 treesize of output 13 [2021-06-12 19:52:02,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,056 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 27 treesize of output 21 [2021-06-12 19:52:03,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:03,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,061 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 25 treesize of output 19 [2021-06-12 19:52:03,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,107 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. [2021-06-12 19:52:03,107 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-12 19:52:03,387 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:52:03,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,393 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 [2021-06-12 19:52:03,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,399 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 35 treesize of output 27 [2021-06-12 19:52:03,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:03,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,408 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 [2021-06-12 19:52:03,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,415 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 25 treesize of output 19 [2021-06-12 19:52:03,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,421 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 18 treesize of output 14 [2021-06-12 19:52:03,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,429 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 27 treesize of output 21 [2021-06-12 19:52:03,430 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,435 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 [2021-06-12 19:52:03,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:03,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,442 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 17 treesize of output 13 [2021-06-12 19:52:03,443 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,448 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 37 treesize of output 29 [2021-06-12 19:52:03,449 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:03,454 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 [2021-06-12 19:52:03,455 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,692 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2021-06-12 19:52:03,693 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-12 19:52:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,697 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 44 treesize of output 19 [2021-06-12 19:52:03,698 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,703 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 24 treesize of output 9 [2021-06-12 19:52:03,703 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,720 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 9 treesize of output 3 [2021-06-12 19:52:03,721 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,725 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 23 treesize of output 11 [2021-06-12 19:52:03,726 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,730 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 12 treesize of output 5 [2021-06-12 19:52:03,731 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,743 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 20 treesize of output 9 [2021-06-12 19:52:03,744 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,749 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 10 treesize of output 5 [2021-06-12 19:52:03,749 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,753 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 [2021-06-12 19:52:03,754 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,758 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 [2021-06-12 19:52:03,759 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,770 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 21 treesize of output 7 [2021-06-12 19:52:03,771 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,774 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 11 treesize of output 3 [2021-06-12 19:52:03,775 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:03,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:03,880 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-12 19:52:04,020 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:52:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:04,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398891604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:04,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:04,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:04,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811121207] [2021-06-12 19:52:04,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:04,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:04,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:04,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:04,083 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) [2021-06-12 19:52:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:04,900 INFO L93 Difference]: Finished difference Result 217 states and 631 transitions. [2021-06-12 19:52:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:52:04,901 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 [2021-06-12 19:52:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:04,901 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:52:04,901 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:52:04,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1093.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:52:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:52:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 171. [2021-06-12 19:52:04,904 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) [2021-06-12 19:52:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 501 transitions. [2021-06-12 19:52:04,904 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 501 transitions. Word has length 17 [2021-06-12 19:52:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:04,905 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 501 transitions. [2021-06-12 19:52:04,905 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) [2021-06-12 19:52:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 501 transitions. [2021-06-12 19:52:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:04,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:04,905 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:05,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-12 19:52:05,121 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:05,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1964167794, now seen corresponding path program 14 times [2021-06-12 19:52:05,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:05,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069248558] [2021-06-12 19:52:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:05,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:05,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069248558] [2021-06-12 19:52:05,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069248558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:05,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007645677] [2021-06-12 19:52:05,335 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 [2021-06-12 19:52:05,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:05,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:05,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:05,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,562 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 [2021-06-12 19:52:05,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,567 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 25 treesize of output 19 [2021-06-12 19:52:05,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,572 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 35 treesize of output 27 [2021-06-12 19:52:05,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:05,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,578 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 [2021-06-12 19:52:05,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:05,658 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. [2021-06-12 19:52:05,659 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:183, output treesize:243 [2021-06-12 19:52:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,895 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 28 treesize of output 22 [2021-06-12 19:52:05,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,905 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 48 treesize of output 38 [2021-06-12 19:52:05,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:52:05,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,924 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 28 treesize of output 22 [2021-06-12 19:52:05,925 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,932 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 36 [2021-06-12 19:52:05,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,941 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 28 treesize of output 22 [2021-06-12 19:52:05,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,949 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 30 treesize of output 24 [2021-06-12 19:52:05,950 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:52:05,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,185 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 87 [2021-06-12 19:52:06,186 INFO L628 ElimStorePlain]: treesize reduction 253, result has 53.0 percent of original size [2021-06-12 19:52:06,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,190 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 11 treesize of output 3 [2021-06-12 19:52:06,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,195 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 [2021-06-12 19:52:06,196 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,200 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 [2021-06-12 19:52:06,201 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,206 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 [2021-06-12 19:52:06,207 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,211 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 44 treesize of output 19 [2021-06-12 19:52:06,212 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,293 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 [2021-06-12 19:52:06,294 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:06,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,378 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 [2021-06-12 19:52:06,387 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:06,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,473 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 11 treesize of output 3 [2021-06-12 19:52:06,474 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,477 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 21 treesize of output 7 [2021-06-12 19:52:06,478 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,570 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 10 treesize of output 5 [2021-06-12 19:52:06,570 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,574 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 20 treesize of output 9 [2021-06-12 19:52:06,575 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:06,675 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:06,751 INFO L518 ElimStorePlain]: Eliminatee v_prenex_159 vanished before elimination [2021-06-12 19:52:06,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:06,756 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-06-12 19:52:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:06,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007645677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:06,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:06,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:06,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845663255] [2021-06-12 19:52:06,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:06,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:06,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:06,951 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) [2021-06-12 19:52:07,617 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 19:52:07,831 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2021-06-12 19:52:08,091 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 127 [2021-06-12 19:52:08,302 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 116 [2021-06-12 19:52:08,500 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-12 19:52:08,912 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-12 19:52:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:08,986 INFO L93 Difference]: Finished difference Result 237 states and 659 transitions. [2021-06-12 19:52:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:52:08,987 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 [2021-06-12 19:52:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:08,988 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:52:08,988 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:52:08,988 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2006.7ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:52:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:52:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 169. [2021-06-12 19:52:08,991 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) [2021-06-12 19:52:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-06-12 19:52:08,991 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-06-12 19:52:08,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:08,992 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-06-12 19:52:08,992 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) [2021-06-12 19:52:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-06-12 19:52:08,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:08,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:08,992 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:09,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:09,206 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:09,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:09,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1751800366, now seen corresponding path program 15 times [2021-06-12 19:52:09,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:09,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727923630] [2021-06-12 19:52:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:09,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:09,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727923630] [2021-06-12 19:52:09,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727923630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:09,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047373392] [2021-06-12 19:52:09,556 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 [2021-06-12 19:52:09,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:09,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:09,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:52:09,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:09,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,686 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 25 treesize of output 19 [2021-06-12 19:52:09,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,692 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 [2021-06-12 19:52:09,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:09,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,699 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 [2021-06-12 19:52:09,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,704 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 25 treesize of output 19 [2021-06-12 19:52:09,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,796 INFO L628 ElimStorePlain]: treesize reduction 84, result has 63.3 percent of original size [2021-06-12 19:52:09,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:09,797 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:173, output treesize:145 [2021-06-12 19:52:10,077 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_171, v_prenex_173, array_4], 1=[v_prenex_170, array_0, v_prenex_172]} [2021-06-12 19:52:10,082 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 20 treesize of output 16 [2021-06-12 19:52:10,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,086 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 18 treesize of output 14 [2021-06-12 19:52:10,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,151 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-06-12 19:52:10,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:10,155 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:10,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:10,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:10,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:10,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,224 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 10 treesize of output 5 [2021-06-12 19:52:10,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,228 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 12 treesize of output 5 [2021-06-12 19:52:10,228 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:10,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,267 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 [2021-06-12 19:52:10,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,270 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 11 treesize of output 3 [2021-06-12 19:52:10,271 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:10,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:10,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,309 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 11 treesize of output 3 [2021-06-12 19:52:10,310 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,312 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 9 treesize of output 3 [2021-06-12 19:52:10,313 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:10,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:52:10,342 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-06-12 19:52:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047373392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:10,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:10,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:10,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225134775] [2021-06-12 19:52:10,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:10,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:10,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:10,383 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) [2021-06-12 19:52:10,691 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-12 19:52:10,882 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-06-12 19:52:11,100 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2021-06-12 19:52:11,305 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 82 [2021-06-12 19:52:11,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:11,352 INFO L93 Difference]: Finished difference Result 292 states and 821 transitions. [2021-06-12 19:52:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:11,353 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 [2021-06-12 19:52:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:11,354 INFO L225 Difference]: With dead ends: 292 [2021-06-12 19:52:11,354 INFO L226 Difference]: Without dead ends: 288 [2021-06-12 19:52:11,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1187.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-12 19:52:11,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 173. [2021-06-12 19:52:11,357 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) [2021-06-12 19:52:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 517 transitions. [2021-06-12 19:52:11,358 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 517 transitions. Word has length 17 [2021-06-12 19:52:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:11,358 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 517 transitions. [2021-06-12 19:52:11,358 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) [2021-06-12 19:52:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 517 transitions. [2021-06-12 19:52:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:11,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:11,359 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:11,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-12 19:52:11,573 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1070448410, now seen corresponding path program 16 times [2021-06-12 19:52:11,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:11,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636905780] [2021-06-12 19:52:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:11,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636905780] [2021-06-12 19:52:11,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636905780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:11,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789499498] [2021-06-12 19:52:11,917 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 [2021-06-12 19:52:11,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:11,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,024 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 25 treesize of output 19 [2021-06-12 19:52:12,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,029 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 [2021-06-12 19:52:12,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,035 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 35 treesize of output 27 [2021-06-12 19:52:12,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:12,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,041 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 25 treesize of output 19 [2021-06-12 19:52:12,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:12,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:12,109 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:191, output treesize:247 [2021-06-12 19:52:12,784 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]} [2021-06-12 19:52:12,789 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 29 treesize of output 23 [2021-06-12 19:52:12,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,795 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 27 treesize of output 21 [2021-06-12 19:52:12,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,886 INFO L628 ElimStorePlain]: treesize reduction 226, result has 36.7 percent of original size [2021-06-12 19:52:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:12,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:12,916 INFO L518 ElimStorePlain]: Eliminatee v_prenex_184 vanished before elimination [2021-06-12 19:52:12,916 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:52:12,919 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 27 treesize of output 21 [2021-06-12 19:52:12,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:12,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:12,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:12,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:12,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,993 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 20 treesize of output 9 [2021-06-12 19:52:12,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:13,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,032 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 20 treesize of output 9 [2021-06-12 19:52:13,032 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:13,067 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:52:13,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-06-12 19:52:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,071 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 [2021-06-12 19:52:13,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,074 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 11 treesize of output 3 [2021-06-12 19:52:13,075 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:13,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:13,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,118 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 21 treesize of output 7 [2021-06-12 19:52:13,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,123 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 11 treesize of output 3 [2021-06-12 19:52:13,123 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:13,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:13,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:52:13,164 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 18 variables, input treesize:369, output treesize:52 [2021-06-12 19:52:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789499498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:13,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:13,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:13,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270535264] [2021-06-12 19:52:13,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:13,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:13,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:13,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:13,213 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) [2021-06-12 19:52:13,634 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2021-06-12 19:52:13,965 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 69 [2021-06-12 19:52:14,214 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 75 [2021-06-12 19:52:14,474 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-12 19:52:14,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:14,567 INFO L93 Difference]: Finished difference Result 276 states and 795 transitions. [2021-06-12 19:52:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:14,568 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 [2021-06-12 19:52:14,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:14,569 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:52:14,569 INFO L226 Difference]: Without dead ends: 272 [2021-06-12 19:52:14,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1787.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:14,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-12 19:52:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2021-06-12 19:52:14,572 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) [2021-06-12 19:52:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 501 transitions. [2021-06-12 19:52:14,573 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 501 transitions. Word has length 17 [2021-06-12 19:52:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:14,573 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 501 transitions. [2021-06-12 19:52:14,573 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) [2021-06-12 19:52:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 501 transitions. [2021-06-12 19:52:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:14,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:14,574 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:14,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable694 [2021-06-12 19:52:14,785 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:14,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1402703998, now seen corresponding path program 17 times [2021-06-12 19:52:14,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:14,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736067851] [2021-06-12 19:52:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:15,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:15,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736067851] [2021-06-12 19:52:15,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736067851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769306619] [2021-06-12 19:52:15,069 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 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 [2021-06-12 19:52:15,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:15,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:52:15,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:15,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,206 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 [2021-06-12 19:52:15,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,210 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 27 treesize of output 21 [2021-06-12 19:52:15,211 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:15,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,214 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 25 treesize of output 19 [2021-06-12 19:52:15,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,218 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 17 treesize of output 13 [2021-06-12 19:52:15,219 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:15,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:15,268 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:175, output treesize:165 [2021-06-12 19:52:15,789 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]} [2021-06-12 19:52:15,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:15,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:15,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:15,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,991 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2021-06-12 19:52:15,992 INFO L628 ElimStorePlain]: treesize reduction 139, result has 63.0 percent of original size [2021-06-12 19:52:15,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:15,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,066 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 19 treesize of output 15 [2021-06-12 19:52:16,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,135 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 7 treesize of output 5 [2021-06-12 19:52:16,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,201 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 28 treesize of output 22 [2021-06-12 19:52:16,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,206 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 30 treesize of output 24 [2021-06-12 19:52:16,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,267 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 21 treesize of output 17 [2021-06-12 19:52:16,268 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:16,272 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,322 INFO L518 ElimStorePlain]: Eliminatee v_prenex_207 vanished before elimination [2021-06-12 19:52:16,322 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-06-12 19:52:16,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,326 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 11 treesize of output 3 [2021-06-12 19:52:16,327 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,384 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 21 treesize of output 7 [2021-06-12 19:52:16,385 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,389 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 24 treesize of output 9 [2021-06-12 19:52:16,390 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,449 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 12 treesize of output 5 [2021-06-12 19:52:16,450 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,453 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 [2021-06-12 19:52:16,454 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,513 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 10 treesize of output 5 [2021-06-12 19:52:16,517 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,520 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 20 treesize of output 9 [2021-06-12 19:52:16,521 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:16,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:52:16,578 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:374, output treesize:66 [2021-06-12 19:52:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:16,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769306619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:16,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:16,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:16,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995549409] [2021-06-12 19:52:16,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:16,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:16,627 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) [2021-06-12 19:52:17,074 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 51 [2021-06-12 19:52:17,454 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 102 [2021-06-12 19:52:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:17,529 INFO L93 Difference]: Finished difference Result 208 states and 594 transitions. [2021-06-12 19:52:17,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:17,529 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 [2021-06-12 19:52:17,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:17,530 INFO L225 Difference]: With dead ends: 208 [2021-06-12 19:52:17,530 INFO L226 Difference]: Without dead ends: 204 [2021-06-12 19:52:17,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1272.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:52:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-12 19:52:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 168. [2021-06-12 19:52:17,532 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) [2021-06-12 19:52:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 497 transitions. [2021-06-12 19:52:17,532 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 497 transitions. Word has length 17 [2021-06-12 19:52:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:17,532 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 497 transitions. [2021-06-12 19:52:17,533 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) [2021-06-12 19:52:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 497 transitions. [2021-06-12 19:52:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:17,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:17,533 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:17,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:17,757 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash 736700478, now seen corresponding path program 18 times [2021-06-12 19:52:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:17,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135165047] [2021-06-12 19:52:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:18,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135165047] [2021-06-12 19:52:18,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135165047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730866669] [2021-06-12 19:52:18,103 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 [2021-06-12 19:52:18,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,241 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 [2021-06-12 19:52:18,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,246 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 [2021-06-12 19:52:18,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:18,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,250 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 17 treesize of output 13 [2021-06-12 19:52:18,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,254 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 [2021-06-12 19:52:18,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:18,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:18,305 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:191, output treesize:181 [2021-06-12 19:52:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,574 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 [2021-06-12 19:52:18,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,581 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 15 treesize of output 11 [2021-06-12 19:52:18,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,820 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-12 19:52:18,821 INFO L628 ElimStorePlain]: treesize reduction 104, result has 78.0 percent of original size [2021-06-12 19:52:18,821 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-06-12 19:52:18,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,826 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 29 treesize of output 23 [2021-06-12 19:52:18,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,833 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 38 treesize of output 30 [2021-06-12 19:52:18,834 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:52:18,840 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,845 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 28 treesize of output 22 [2021-06-12 19:52:18,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,968 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 19:52:18,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,974 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 24 treesize of output 9 [2021-06-12 19:52:18,974 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,979 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 12 treesize of output 5 [2021-06-12 19:52:18,979 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:18,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,992 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 11 treesize of output 3 [2021-06-12 19:52:18,993 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,998 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 21 treesize of output 7 [2021-06-12 19:52:18,998 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,003 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 24 treesize of output 9 [2021-06-12 19:52:19,004 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,008 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 46 treesize of output 15 [2021-06-12 19:52:19,008 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,127 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 19:52:19,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,131 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 [2021-06-12 19:52:19,132 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:19,244 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 19:52:19,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,249 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 10 treesize of output 5 [2021-06-12 19:52:19,250 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,254 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 9 [2021-06-12 19:52:19,254 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,371 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 19:52:19,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,377 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 17 treesize of output 13 [2021-06-12 19:52:19,378 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,382 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 27 treesize of output 21 [2021-06-12 19:52:19,383 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:19,501 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 19:52:19,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,506 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 9 treesize of output 3 [2021-06-12 19:52:19,507 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,512 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 11 treesize of output 3 [2021-06-12 19:52:19,512 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,516 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 21 treesize of output 7 [2021-06-12 19:52:19,517 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,630 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 19:52:19,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:19,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:19,635 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:486, output treesize:219 [2021-06-12 19:52:19,792 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-06-12 19:52:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:19,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730866669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:19,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:19,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:52:19,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041290482] [2021-06-12 19:52:19,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:19,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:19,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:19,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:19,880 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) [2021-06-12 19:52:20,420 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-06-12 19:52:20,604 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-06-12 19:52:20,794 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-12 19:52:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:20,857 INFO L93 Difference]: Finished difference Result 217 states and 622 transitions. [2021-06-12 19:52:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:20,857 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 [2021-06-12 19:52:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:20,858 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:52:20,858 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:52:20,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1327.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:52:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:52:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 163. [2021-06-12 19:52:20,861 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) [2021-06-12 19:52:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 477 transitions. [2021-06-12 19:52:20,861 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 477 transitions. Word has length 17 [2021-06-12 19:52:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:20,861 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 477 transitions. [2021-06-12 19:52:20,862 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) [2021-06-12 19:52:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 477 transitions. [2021-06-12 19:52:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:20,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:20,862 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:21,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-12 19:52:21,086 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:21,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1308901226, now seen corresponding path program 19 times [2021-06-12 19:52:21,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:21,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278192655] [2021-06-12 19:52:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:21,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278192655] [2021-06-12 19:52:21,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278192655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:21,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507526564] [2021-06-12 19:52:21,355 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 [2021-06-12 19:52:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:21,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:21,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:21,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,490 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 15 treesize of output 11 [2021-06-12 19:52:21,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,496 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 27 treesize of output 21 [2021-06-12 19:52:21,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,501 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 [2021-06-12 19:52:21,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,505 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 17 treesize of output 13 [2021-06-12 19:52:21,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:21,539 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. [2021-06-12 19:52:21,540 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:115, output treesize:103 [2021-06-12 19:52:21,899 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-12 19:52:21,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,903 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 17 treesize of output 13 [2021-06-12 19:52:21,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,908 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 25 treesize of output 19 [2021-06-12 19:52:21,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,913 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 15 treesize of output 11 [2021-06-12 19:52:21,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,918 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 27 treesize of output 21 [2021-06-12 19:52:21,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,924 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 [2021-06-12 19:52:21,925 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,929 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 37 treesize of output 29 [2021-06-12 19:52:21,930 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:21,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,934 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 27 treesize of output 21 [2021-06-12 19:52:21,935 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:21,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,940 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 35 treesize of output 27 [2021-06-12 19:52:21,941 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:21,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,947 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 18 treesize of output 14 [2021-06-12 19:52:21,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,952 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 28 treesize of output 22 [2021-06-12 19:52:21,953 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:22,189 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-06-12 19:52:22,189 INFO L628 ElimStorePlain]: treesize reduction 144, result has 71.3 percent of original size [2021-06-12 19:52:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,195 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 9 treesize of output 3 [2021-06-12 19:52:22,195 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,201 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 12 treesize of output 5 [2021-06-12 19:52:22,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,207 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 23 treesize of output 11 [2021-06-12 19:52:22,208 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,221 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 [2021-06-12 19:52:22,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,227 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 [2021-06-12 19:52:22,227 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,240 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 20 treesize of output 9 [2021-06-12 19:52:22,241 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,247 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 24 treesize of output 9 [2021-06-12 19:52:22,247 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,252 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 44 treesize of output 19 [2021-06-12 19:52:22,253 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:22,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,270 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 [2021-06-12 19:52:22,271 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,275 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 [2021-06-12 19:52:22,276 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,280 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 [2021-06-12 19:52:22,281 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:22,389 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-12 19:52:22,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:22,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:22,393 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 7 variables, input treesize:403, output treesize:179 [2021-06-12 19:52:22,537 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:52:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507526564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:22,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:22,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:22,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308179924] [2021-06-12 19:52:22,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:22,593 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) [2021-06-12 19:52:23,094 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-12 19:52:23,392 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-06-12 19:52:23,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:23,456 INFO L93 Difference]: Finished difference Result 235 states and 676 transitions. [2021-06-12 19:52:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:52:23,456 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 [2021-06-12 19:52:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:23,457 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:52:23,457 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:52:23,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1182.4ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:23,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:52:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 167. [2021-06-12 19:52:23,459 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) [2021-06-12 19:52:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 489 transitions. [2021-06-12 19:52:23,460 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 489 transitions. Word has length 17 [2021-06-12 19:52:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:23,460 INFO L482 AbstractCegarLoop]: Abstraction has 167 states and 489 transitions. [2021-06-12 19:52:23,460 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) [2021-06-12 19:52:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 489 transitions. [2021-06-12 19:52:23,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:23,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:23,460 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:23,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:23,661 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:23,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:23,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2024967756, now seen corresponding path program 20 times [2021-06-12 19:52:23,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:23,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35198260] [2021-06-12 19:52:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:23,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35198260] [2021-06-12 19:52:23,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35198260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:23,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611918429] [2021-06-12 19:52:23,875 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 [2021-06-12 19:52:23,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:23,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:23,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,997 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 25 treesize of output 19 [2021-06-12 19:52:23,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,001 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 15 treesize of output 11 [2021-06-12 19:52:24,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,005 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 [2021-06-12 19:52:24,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,009 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 35 treesize of output 27 [2021-06-12 19:52:24,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:24,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:24,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:221 [2021-06-12 19:52:24,507 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]} [2021-06-12 19:52:24,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:24,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,517 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 [2021-06-12 19:52:24,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,626 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 75 [2021-06-12 19:52:24,626 INFO L628 ElimStorePlain]: treesize reduction 128, result has 57.8 percent of original size [2021-06-12 19:52:24,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:24,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:24,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:24,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:24,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,733 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 29 treesize of output 23 [2021-06-12 19:52:24,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:24,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,842 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 20 treesize of output 9 [2021-06-12 19:52:24,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,847 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 24 treesize of output 9 [2021-06-12 19:52:24,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,895 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 21 treesize of output 7 [2021-06-12 19:52:24,896 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,899 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 11 treesize of output 3 [2021-06-12 19:52:24,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:24,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,953 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 11 treesize of output 3 [2021-06-12 19:52:24,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,957 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 [2021-06-12 19:52:24,958 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:25,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:25,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,009 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 12 treesize of output 5 [2021-06-12 19:52:25,009 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:25,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:25,049 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-06-12 19:52:25,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:25,052 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 15 variables, input treesize:315, output treesize:62 [2021-06-12 19:52:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:25,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611918429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:25,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:25,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:25,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622249647] [2021-06-12 19:52:25,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:25,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:25,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:25,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:25,099 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) [2021-06-12 19:52:25,551 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2021-06-12 19:52:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:25,624 INFO L93 Difference]: Finished difference Result 198 states and 571 transitions. [2021-06-12 19:52:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:25,624 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 [2021-06-12 19:52:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:25,625 INFO L225 Difference]: With dead ends: 198 [2021-06-12 19:52:25,625 INFO L226 Difference]: Without dead ends: 194 [2021-06-12 19:52:25,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 829.1ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-06-12 19:52:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 171. [2021-06-12 19:52:25,627 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) [2021-06-12 19:52:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 503 transitions. [2021-06-12 19:52:25,628 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 503 transitions. Word has length 17 [2021-06-12 19:52:25,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:25,628 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 503 transitions. [2021-06-12 19:52:25,628 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) [2021-06-12 19:52:25,628 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 503 transitions. [2021-06-12 19:52:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:25,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:25,629 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:25,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-12 19:52:25,841 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2023379368, now seen corresponding path program 21 times [2021-06-12 19:52:25,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:25,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886942207] [2021-06-12 19:52:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:26,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886942207] [2021-06-12 19:52:26,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886942207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14791506] [2021-06-12 19:52:26,028 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 [2021-06-12 19:52:26,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:26,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:26,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:26,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,144 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 [2021-06-12 19:52:26,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,148 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 [2021-06-12 19:52:26,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,152 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 25 treesize of output 19 [2021-06-12 19:52:26,153 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,155 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 [2021-06-12 19:52:26,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:26,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:26,222 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:215 [2021-06-12 19:52:26,326 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]} [2021-06-12 19:52:26,331 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 47 treesize of output 37 [2021-06-12 19:52:26,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:26,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,346 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 [2021-06-12 19:52:26,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,351 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 29 treesize of output 23 [2021-06-12 19:52:26,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,359 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 45 treesize of output 35 [2021-06-12 19:52:26,360 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:52:26,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,371 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 29 treesize of output 23 [2021-06-12 19:52:26,372 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,376 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:52:26,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,534 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-06-12 19:52:26,535 INFO L628 ElimStorePlain]: treesize reduction 186, result has 57.8 percent of original size [2021-06-12 19:52:26,538 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 7 treesize of output 5 [2021-06-12 19:52:26,539 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,608 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 27 treesize of output 21 [2021-06-12 19:52:26,609 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:26,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:26,681 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:26,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,763 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 9 [2021-06-12 19:52:26,763 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,767 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 20 treesize of output 9 [2021-06-12 19:52:26,768 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,772 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 12 treesize of output 5 [2021-06-12 19:52:26,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,776 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 [2021-06-12 19:52:26,777 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,780 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 12 treesize of output 5 [2021-06-12 19:52:26,780 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,851 INFO L518 ElimStorePlain]: Eliminatee v_prenex_244 vanished before elimination [2021-06-12 19:52:26,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,854 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 21 treesize of output 7 [2021-06-12 19:52:26,855 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,858 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 11 treesize of output 3 [2021-06-12 19:52:26,858 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:26,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,951 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 [2021-06-12 19:52:26,952 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,956 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 [2021-06-12 19:52:26,956 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:27,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:27,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:27,031 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:555, output treesize:159 [2021-06-12 19:52:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14791506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:27,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:27,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211715011] [2021-06-12 19:52:27,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:27,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:27,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:27,179 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) [2021-06-12 19:52:27,630 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-12 19:52:27,842 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-06-12 19:52:27,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:27,893 INFO L93 Difference]: Finished difference Result 209 states and 604 transitions. [2021-06-12 19:52:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:52:27,893 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 [2021-06-12 19:52:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:27,894 INFO L225 Difference]: With dead ends: 209 [2021-06-12 19:52:27,894 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:52:27,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 859.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:52:27,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 169. [2021-06-12 19:52:27,896 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) [2021-06-12 19:52:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 495 transitions. [2021-06-12 19:52:27,897 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 495 transitions. Word has length 17 [2021-06-12 19:52:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:27,897 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 495 transitions. [2021-06-12 19:52:27,897 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) [2021-06-12 19:52:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 495 transitions. [2021-06-12 19:52:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:27,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:27,898 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:28,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-06-12 19:52:28,113 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:28,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2098340236, now seen corresponding path program 22 times [2021-06-12 19:52:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:28,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301574943] [2021-06-12 19:52:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:28,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301574943] [2021-06-12 19:52:28,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301574943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539277299] [2021-06-12 19:52:28,289 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 [2021-06-12 19:52:28,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:28,407 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 25 treesize of output 19 [2021-06-12 19:52:28,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,411 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 27 treesize of output 21 [2021-06-12 19:52:28,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:28,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:28,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:28,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,467 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 25 treesize of output 19 [2021-06-12 19:52:28,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:28,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:28,520 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-06-12 19:52:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,618 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 38 treesize of output 30 [2021-06-12 19:52:28,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:28,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,624 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 35 treesize of output 27 [2021-06-12 19:52:28,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:28,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,630 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 25 treesize of output 19 [2021-06-12 19:52:28,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,635 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 28 treesize of output 22 [2021-06-12 19:52:28,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,640 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 35 treesize of output 27 [2021-06-12 19:52:28,641 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,646 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 15 treesize of output 11 [2021-06-12 19:52:28,647 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,651 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 29 treesize of output 23 [2021-06-12 19:52:28,652 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:28,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,657 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 19 treesize of output 15 [2021-06-12 19:52:28,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,662 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 [2021-06-12 19:52:28,663 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,667 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 25 treesize of output 19 [2021-06-12 19:52:28,668 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,844 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2021-06-12 19:52:28,844 INFO L628 ElimStorePlain]: treesize reduction 375, result has 39.3 percent of original size [2021-06-12 19:52:28,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,848 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 21 treesize of output 7 [2021-06-12 19:52:28,848 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,852 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 20 treesize of output 9 [2021-06-12 19:52:28,853 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,858 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 20 treesize of output 9 [2021-06-12 19:52:28,859 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:28,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,873 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 21 treesize of output 7 [2021-06-12 19:52:28,874 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,879 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 21 treesize of output 7 [2021-06-12 19:52:28,879 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:28,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,893 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 [2021-06-12 19:52:28,894 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:52:28,898 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:28,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:52:28,983 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-06-12 19:52:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539277299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:29,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:29,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548243787] [2021-06-12 19:52:29,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:29,165 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) [2021-06-12 19:52:29,539 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2021-06-12 19:52:29,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:29,610 INFO L93 Difference]: Finished difference Result 199 states and 579 transitions. [2021-06-12 19:52:29,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:52:29,610 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 [2021-06-12 19:52:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:29,611 INFO L225 Difference]: With dead ends: 199 [2021-06-12 19:52:29,611 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 19:52:29,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:29,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 19:52:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2021-06-12 19:52:29,614 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) [2021-06-12 19:52:29,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 507 transitions. [2021-06-12 19:52:29,615 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 507 transitions. Word has length 17 [2021-06-12 19:52:29,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:29,615 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 507 transitions. [2021-06-12 19:52:29,615 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) [2021-06-12 19:52:29,615 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 507 transitions. [2021-06-12 19:52:29,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:29,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:29,615 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:29,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:29,837 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:29,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:29,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1062058060, now seen corresponding path program 23 times [2021-06-12 19:52:29,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:29,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744272694] [2021-06-12 19:52:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:30,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744272694] [2021-06-12 19:52:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744272694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:30,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391564724] [2021-06-12 19:52:30,048 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 [2021-06-12 19:52:30,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:52:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:30,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,365 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 25 treesize of output 19 [2021-06-12 19:52:30,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,369 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 27 treesize of output 21 [2021-06-12 19:52:30,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:30,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:30,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,459 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 [2021-06-12 19:52:30,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,464 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 15 treesize of output 11 [2021-06-12 19:52:30,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,549 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 25 treesize of output 19 [2021-06-12 19:52:30,550 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,554 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 [2021-06-12 19:52:30,554 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:30,631 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. [2021-06-12 19:52:30,631 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:262, output treesize:236 [2021-06-12 19:52:30,946 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-12 19:52:30,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,951 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 25 treesize of output 19 [2021-06-12 19:52:30,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,957 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 [2021-06-12 19:52:30,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,963 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 15 treesize of output 11 [2021-06-12 19:52:30,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,968 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 35 treesize of output 27 [2021-06-12 19:52:30,969 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:30,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,974 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 35 treesize of output 27 [2021-06-12 19:52:30,975 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:30,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,981 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 37 treesize of output 29 [2021-06-12 19:52:30,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:30,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,988 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 [2021-06-12 19:52:30,988 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:30,995 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 18 treesize of output 14 [2021-06-12 19:52:30,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,002 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 28 treesize of output 22 [2021-06-12 19:52:31,003 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,009 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 15 treesize of output 11 [2021-06-12 19:52:31,010 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,016 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 27 treesize of output 21 [2021-06-12 19:52:31,016 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,022 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 25 treesize of output 19 [2021-06-12 19:52:31,023 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,328 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2021-06-12 19:52:31,328 INFO L628 ElimStorePlain]: treesize reduction 337, result has 55.5 percent of original size [2021-06-12 19:52:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,333 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 23 treesize of output 11 [2021-06-12 19:52:31,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,338 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 12 treesize of output 5 [2021-06-12 19:52:31,347 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,360 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 [2021-06-12 19:52:31,361 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,365 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 [2021-06-12 19:52:31,366 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:31,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,379 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 24 treesize of output 9 [2021-06-12 19:52:31,379 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,384 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 44 treesize of output 19 [2021-06-12 19:52:31,384 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,401 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 10 treesize of output 5 [2021-06-12 19:52:31,402 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,407 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 21 treesize of output 7 [2021-06-12 19:52:31,407 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,412 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 21 treesize of output 7 [2021-06-12 19:52:31,412 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:31,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,424 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 20 treesize of output 9 [2021-06-12 19:52:31,433 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,544 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 19:52:31,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:31,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:31,549 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 7 variables, input treesize:603, output treesize:241 [2021-06-12 19:52:31,717 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-06-12 19:52:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:31,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391564724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:31,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:31,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:52:31,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564584920] [2021-06-12 19:52:31,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:31,806 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) [2021-06-12 19:52:32,094 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-12 19:52:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:32,337 INFO L93 Difference]: Finished difference Result 219 states and 627 transitions. [2021-06-12 19:52:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:52:32,337 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 [2021-06-12 19:52:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:32,338 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:52:32,338 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:52:32,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1028.8ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:52:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 184. [2021-06-12 19:52:32,341 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) [2021-06-12 19:52:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-06-12 19:52:32,342 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-06-12 19:52:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:32,342 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-06-12 19:52:32,342 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) [2021-06-12 19:52:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-06-12 19:52:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:32,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:32,342 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable929 [2021-06-12 19:52:32,565 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 419179810, now seen corresponding path program 24 times [2021-06-12 19:52:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143778980] [2021-06-12 19:52:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:32,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:32,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:32,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143778980] [2021-06-12 19:52:32,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143778980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:32,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481199955] [2021-06-12 19:52:32,879 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 [2021-06-12 19:52:32,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:32,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:52:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:33,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,123 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 27 treesize of output 21 [2021-06-12 19:52:33,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:33,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,128 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 [2021-06-12 19:52:33,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:33,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,199 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 15 treesize of output 11 [2021-06-12 19:52:33,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:52:33,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,274 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 [2021-06-12 19:52:33,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,283 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 [2021-06-12 19:52:33,284 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:33,349 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. [2021-06-12 19:52:33,349 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:223, output treesize:199 [2021-06-12 19:52:33,874 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]} [2021-06-12 19:52:33,880 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 15 treesize of output 11 [2021-06-12 19:52:33,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,042 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 103 [2021-06-12 19:52:34,042 INFO L628 ElimStorePlain]: treesize reduction 122, result has 69.3 percent of original size [2021-06-12 19:52:34,042 INFO L518 ElimStorePlain]: Eliminatee v_prenex_270 vanished before elimination [2021-06-12 19:52:34,042 INFO L518 ElimStorePlain]: Eliminatee v_prenex_281 vanished before elimination [2021-06-12 19:52:34,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:34,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:34,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:34,130 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 29 treesize of output 23 [2021-06-12 19:52:34,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:34,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,216 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 27 treesize of output 21 [2021-06-12 19:52:34,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:34,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,304 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:52:34,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:34,314 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:34,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:34,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,505 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 19 treesize of output 15 [2021-06-12 19:52:34,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:34,511 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_280 vanished before elimination [2021-06-12 19:52:34,596 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-06-12 19:52:34,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,602 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 24 treesize of output 9 [2021-06-12 19:52:34,602 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,607 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 12 treesize of output 5 [2021-06-12 19:52:34,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,622 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 24 treesize of output 9 [2021-06-12 19:52:34,623 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,627 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 46 treesize of output 15 [2021-06-12 19:52:34,628 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,721 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:34,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,726 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 11 treesize of output 3 [2021-06-12 19:52:34,727 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,731 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 [2021-06-12 19:52:34,732 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,824 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 9 treesize of output 3 [2021-06-12 19:52:34,825 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:34,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,908 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 20 treesize of output 9 [2021-06-12 19:52:34,909 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:34,912 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 10 treesize of output 5 [2021-06-12 19:52:34,913 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:34,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:35,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,006 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 [2021-06-12 19:52:35,007 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,010 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 [2021-06-12 19:52:35,011 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:35,087 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-06-12 19:52:35,087 INFO L518 ElimStorePlain]: Eliminatee v_prenex_269 vanished before elimination [2021-06-12 19:52:35,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 20 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 19:52:35,091 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 30 variables, input treesize:405, output treesize:126 [2021-06-12 19:52:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481199955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:35,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:52:35,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733757358] [2021-06-12 19:52:35,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:35,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:35,152 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) [2021-06-12 19:52:35,504 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-12 19:52:35,678 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-06-12 19:52:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:35,798 INFO L93 Difference]: Finished difference Result 234 states and 660 transitions. [2021-06-12 19:52:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:52:35,798 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 [2021-06-12 19:52:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:35,799 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:52:35,799 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:52:35,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 888.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:52:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:52:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 187. [2021-06-12 19:52:35,802 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) [2021-06-12 19:52:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 552 transitions. [2021-06-12 19:52:35,802 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 552 transitions. Word has length 17 [2021-06-12 19:52:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:35,802 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 552 transitions. [2021-06-12 19:52:35,802 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) [2021-06-12 19:52:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 552 transitions. [2021-06-12 19:52:35,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:35,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:35,803 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:36,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:36,003 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash 516905718, now seen corresponding path program 25 times [2021-06-12 19:52:36,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:36,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325340559] [2021-06-12 19:52:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:36,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325340559] [2021-06-12 19:52:36,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325340559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331388206] [2021-06-12 19:52:36,265 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 [2021-06-12 19:52:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,406 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 27 treesize of output 21 [2021-06-12 19:52:36,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:36,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,412 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 17 treesize of output 13 [2021-06-12 19:52:36,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:36,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,417 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 25 treesize of output 19 [2021-06-12 19:52:36,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:36,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:36,422 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 15 treesize of output 11 [2021-06-12 19:52:36,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:36,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:36,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:36,477 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-12 19:52:36,832 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]} [2021-06-12 19:52:36,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:36,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:36,843 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 17 treesize of output 13 [2021-06-12 19:52:36,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,058 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 86 [2021-06-12 19:52:37,059 INFO L628 ElimStorePlain]: treesize reduction 152, result has 58.7 percent of original size [2021-06-12 19:52:37,063 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 [2021-06-12 19:52:37,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,126 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 30 treesize of output 24 [2021-06-12 19:52:37,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,130 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 [2021-06-12 19:52:37,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,187 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 [2021-06-12 19:52:37,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:37,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,248 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 7 treesize of output 5 [2021-06-12 19:52:37,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:37,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,313 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 19 treesize of output 15 [2021-06-12 19:52:37,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,372 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-06-12 19:52:37,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,376 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 [2021-06-12 19:52:37,377 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,380 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 21 treesize of output 7 [2021-06-12 19:52:37,381 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,436 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 10 treesize of output 5 [2021-06-12 19:52:37,436 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,439 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 20 treesize of output 9 [2021-06-12 19:52:37,440 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,494 INFO L518 ElimStorePlain]: Eliminatee v_prenex_300 vanished before elimination [2021-06-12 19:52:37,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,498 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 11 treesize of output 3 [2021-06-12 19:52:37,499 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,502 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 12 treesize of output 5 [2021-06-12 19:52:37,503 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:52:37,553 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:37,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:52:37,601 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-12 19:52:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:37,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331388206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:37,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:37,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:37,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300778650] [2021-06-12 19:52:37,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:37,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:37,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:37,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:37,646 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) [2021-06-12 19:52:38,010 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-06-12 19:52:38,212 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2021-06-12 19:52:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:38,337 INFO L93 Difference]: Finished difference Result 230 states and 649 transitions. [2021-06-12 19:52:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:52:38,337 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 [2021-06-12 19:52:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:38,338 INFO L225 Difference]: With dead ends: 230 [2021-06-12 19:52:38,338 INFO L226 Difference]: Without dead ends: 222 [2021-06-12 19:52:38,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:52:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-12 19:52:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2021-06-12 19:52:38,340 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) [2021-06-12 19:52:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-06-12 19:52:38,341 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-06-12 19:52:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:38,341 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-06-12 19:52:38,341 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) [2021-06-12 19:52:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-06-12 19:52:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:38,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:38,342 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:38,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1070 [2021-06-12 19:52:38,557 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 968096220, now seen corresponding path program 26 times [2021-06-12 19:52:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:38,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202523060] [2021-06-12 19:52:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:38,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:38,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202523060] [2021-06-12 19:52:38,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202523060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:38,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183318443] [2021-06-12 19:52:38,844 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 [2021-06-12 19:52:38,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:38,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:38,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:38,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,953 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 25 treesize of output 19 [2021-06-12 19:52:38,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,957 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 [2021-06-12 19:52:38,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:38,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,960 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 [2021-06-12 19:52:38,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:38,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:38,964 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 35 treesize of output 27 [2021-06-12 19:52:38,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:39,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:39,023 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:215 [2021-06-12 19:52:39,425 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]} [2021-06-12 19:52:39,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:39,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,436 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 29 treesize of output 23 [2021-06-12 19:52:39,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,546 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-06-12 19:52:39,546 INFO L628 ElimStorePlain]: treesize reduction 121, result has 59.4 percent of original size [2021-06-12 19:52:39,550 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 7 treesize of output 5 [2021-06-12 19:52:39,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,594 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 27 treesize of output 21 [2021-06-12 19:52:39,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:39,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,646 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 29 treesize of output 23 [2021-06-12 19:52:39,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,650 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 [2021-06-12 19:52:39,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,695 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 27 treesize of output 21 [2021-06-12 19:52:39,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:39,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,746 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 12 treesize of output 5 [2021-06-12 19:52:39,746 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,795 INFO L518 ElimStorePlain]: Eliminatee v_prenex_318 vanished before elimination [2021-06-12 19:52:39,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,800 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 [2021-06-12 19:52:39,800 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,804 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 21 treesize of output 7 [2021-06-12 19:52:39,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,859 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 24 treesize of output 9 [2021-06-12 19:52:39,860 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:52:39,864 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,910 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 [2021-06-12 19:52:39,911 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,914 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 21 treesize of output 7 [2021-06-12 19:52:39,914 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:39,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:39,964 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:315, output treesize:62 [2021-06-12 19:52:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183318443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:40,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:40,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:40,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216791585] [2021-06-12 19:52:40,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:40,013 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) [2021-06-12 19:52:40,328 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-12 19:52:40,592 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 87 [2021-06-12 19:52:40,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:40,661 INFO L93 Difference]: Finished difference Result 208 states and 601 transitions. [2021-06-12 19:52:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:52:40,661 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 [2021-06-12 19:52:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:40,662 INFO L225 Difference]: With dead ends: 208 [2021-06-12 19:52:40,662 INFO L226 Difference]: Without dead ends: 204 [2021-06-12 19:52:40,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1028.9ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:40,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-12 19:52:40,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2021-06-12 19:52:40,664 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) [2021-06-12 19:52:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 554 transitions. [2021-06-12 19:52:40,665 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 554 transitions. Word has length 17 [2021-06-12 19:52:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:40,665 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 554 transitions. [2021-06-12 19:52:40,665 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) [2021-06-12 19:52:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 554 transitions. [2021-06-12 19:52:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:40,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:40,666 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:40,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1106,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:40,889 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:40,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:40,889 INFO L82 PathProgramCache]: Analyzing trace with hash -557813204, now seen corresponding path program 27 times [2021-06-12 19:52:40,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:40,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011662268] [2021-06-12 19:52:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:41,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011662268] [2021-06-12 19:52:41,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011662268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825489457] [2021-06-12 19:52:41,177 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 [2021-06-12 19:52:41,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:52:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:41,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:52:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,312 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 15 treesize of output 11 [2021-06-12 19:52:41,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,315 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 25 treesize of output 19 [2021-06-12 19:52:41,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,350 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 27 treesize of output 21 [2021-06-12 19:52:41,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,354 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 [2021-06-12 19:52:41,355 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,390 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. [2021-06-12 19:52:41,390 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:134, output treesize:122 [2021-06-12 19:52:41,576 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]} [2021-06-12 19:52:41,580 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 25 treesize of output 19 [2021-06-12 19:52:41,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,673 INFO L628 ElimStorePlain]: treesize reduction 150, result has 46.8 percent of original size [2021-06-12 19:52:41,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:41,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:41,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,715 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 27 treesize of output 21 [2021-06-12 19:52:41,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:41,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:41,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,763 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 27 treesize of output 21 [2021-06-12 19:52:41,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,804 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 11 treesize of output 3 [2021-06-12 19:52:41,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,807 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 21 treesize of output 7 [2021-06-12 19:52:41,808 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,849 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:52:41,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,852 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 [2021-06-12 19:52:41,853 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,855 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 [2021-06-12 19:52:41,856 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:52:41,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:41,904 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 10 treesize of output 5 [2021-06-12 19:52:41,904 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:41,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:41,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:52:41,939 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:289, output treesize:52 [2021-06-12 19:52:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825489457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:41,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 19:52:41,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878695936] [2021-06-12 19:52:41,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:41,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:41,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:41,990 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) [2021-06-12 19:52:42,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:42,394 INFO L93 Difference]: Finished difference Result 219 states and 634 transitions. [2021-06-12 19:52:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:52:42,394 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 [2021-06-12 19:52:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:42,395 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:52:42,395 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 19:52:42,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 19:52:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2021-06-12 19:52:42,397 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) [2021-06-12 19:52:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 546 transitions. [2021-06-12 19:52:42,398 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 546 transitions. Word has length 17 [2021-06-12 19:52:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:42,398 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 546 transitions. [2021-06-12 19:52:42,398 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) [2021-06-12 19:52:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 546 transitions. [2021-06-12 19:52:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:42,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:42,398 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:42,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1131,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:42,599 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash 153290066, now seen corresponding path program 28 times [2021-06-12 19:52:42,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:42,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433883324] [2021-06-12 19:52:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:42,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:42,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433883324] [2021-06-12 19:52:42,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433883324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:42,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070118396] [2021-06-12 19:52:42,876 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 [2021-06-12 19:52:42,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:42,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:42,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:52:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:42,988 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 27 treesize of output 21 [2021-06-12 19:52:42,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:42,998 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 25 treesize of output 19 [2021-06-12 19:52:42,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:52:43,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,052 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 [2021-06-12 19:52:43,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:43,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:43,096 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:168, output treesize:158 [2021-06-12 19:52:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,193 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 38 treesize of output 30 [2021-06-12 19:52:43,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:43,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,199 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 15 treesize of output 11 [2021-06-12 19:52:43,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,204 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 28 treesize of output 22 [2021-06-12 19:52:43,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,209 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 35 treesize of output 27 [2021-06-12 19:52:43,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:43,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,215 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 19 treesize of output 15 [2021-06-12 19:52:43,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,220 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 29 treesize of output 23 [2021-06-12 19:52:43,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:43,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,226 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 35 treesize of output 27 [2021-06-12 19:52:43,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:43,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,232 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 [2021-06-12 19:52:43,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,237 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 [2021-06-12 19:52:43,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,243 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 [2021-06-12 19:52:43,243 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,420 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2021-06-12 19:52:43,420 INFO L628 ElimStorePlain]: treesize reduction 378, result has 39.1 percent of original size [2021-06-12 19:52:43,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,424 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 21 treesize of output 7 [2021-06-12 19:52:43,424 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,434 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 12 treesize of output 5 [2021-06-12 19:52:43,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,438 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 11 treesize of output 3 [2021-06-12 19:52:43,439 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,442 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 20 treesize of output 9 [2021-06-12 19:52:43,442 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,445 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 20 treesize of output 9 [2021-06-12 19:52:43,446 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:43,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,456 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 [2021-06-12 19:52:43,457 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,459 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 21 treesize of output 7 [2021-06-12 19:52:43,460 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:43,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:43,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:52:43,532 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:455, output treesize:164 [2021-06-12 19:52:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070118396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:43,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:43,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752675934] [2021-06-12 19:52:43,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:43,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:43,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:43,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:43,724 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) [2021-06-12 19:52:44,048 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-06-12 19:52:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:44,130 INFO L93 Difference]: Finished difference Result 209 states and 609 transitions. [2021-06-12 19:52:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:52:44,130 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 [2021-06-12 19:52:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:44,131 INFO L225 Difference]: With dead ends: 209 [2021-06-12 19:52:44,131 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:52:44,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 699.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:52:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 184. [2021-06-12 19:52:44,134 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) [2021-06-12 19:52:44,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 540 transitions. [2021-06-12 19:52:44,134 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 540 transitions. Word has length 17 [2021-06-12 19:52:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:44,134 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 540 transitions. [2021-06-12 19:52:44,134 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) [2021-06-12 19:52:44,134 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 540 transitions. [2021-06-12 19:52:44,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:44,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:44,135 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:44,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:44,358 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1175189202, now seen corresponding path program 29 times [2021-06-12 19:52:44,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:44,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797884108] [2021-06-12 19:52:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797884108] [2021-06-12 19:52:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797884108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020439612] [2021-06-12 19:52:44,596 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 [2021-06-12 19:52:44,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:52:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:52:44,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:44,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,706 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 [2021-06-12 19:52:44,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:44,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,710 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 35 treesize of output 27 [2021-06-12 19:52:44,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,715 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 [2021-06-12 19:52:44,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:44,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:44,719 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 25 treesize of output 19 [2021-06-12 19:52:44,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:44,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:44,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:44,816 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:293 [2021-06-12 19:52:45,403 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 96 [2021-06-12 19:52:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,359 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 30 treesize of output 24 [2021-06-12 19:52:46,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:46,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,383 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 28 treesize of output 22 [2021-06-12 19:52:46,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:46,939 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 161 [2021-06-12 19:52:46,939 INFO L628 ElimStorePlain]: treesize reduction 534, result has 50.6 percent of original size [2021-06-12 19:52:46,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,947 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 27 treesize of output 21 [2021-06-12 19:52:46,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:47,167 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-12 19:52:47,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:47,176 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 7 treesize of output 5 [2021-06-12 19:52:47,176 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,401 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-12 19:52:47,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:47,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,409 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 12 treesize of output 5 [2021-06-12 19:52:47,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,617 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-12 19:52:47,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:47,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,626 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 19 treesize of output 15 [2021-06-12 19:52:47,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,633 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 30 treesize of output 24 [2021-06-12 19:52:47,634 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,031 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 145 [2021-06-12 19:52:48,031 INFO L628 ElimStorePlain]: treesize reduction 11, result has 97.9 percent of original size [2021-06-12 19:52:48,031 INFO L518 ElimStorePlain]: Eliminatee v_prenex_351 vanished before elimination [2021-06-12 19:52:48,038 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 7 treesize of output 5 [2021-06-12 19:52:48,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,233 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 19:52:48,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:48,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,241 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 11 treesize of output 3 [2021-06-12 19:52:48,242 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,248 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 [2021-06-12 19:52:48,249 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,438 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 19:52:48,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:48,439 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-06-12 19:52:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,445 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 27 treesize of output 21 [2021-06-12 19:52:48,446 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:48,645 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-12 19:52:48,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,653 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 11 treesize of output 3 [2021-06-12 19:52:48,653 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,659 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 21 treesize of output 7 [2021-06-12 19:52:48,660 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:48,858 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-12 19:52:48,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:48,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,865 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 30 treesize of output 24 [2021-06-12 19:52:48,866 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,872 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 28 treesize of output 22 [2021-06-12 19:52:48,873 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:49,231 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 122 [2021-06-12 19:52:49,232 INFO L628 ElimStorePlain]: treesize reduction 10, result has 97.9 percent of original size [2021-06-12 19:52:49,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,239 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 21 treesize of output 7 [2021-06-12 19:52:49,239 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,245 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 12 treesize of output 5 [2021-06-12 19:52:49,246 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:49,415 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 19:52:49,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:49,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,422 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 27 treesize of output 21 [2021-06-12 19:52:49,423 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:49,599 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 19:52:49,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:49,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,606 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 20 treesize of output 9 [2021-06-12 19:52:49,607 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:49,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,613 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 10 treesize of output 5 [2021-06-12 19:52:49,613 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:49,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:49,791 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 19:52:49,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:49,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,800 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 48 treesize of output 38 [2021-06-12 19:52:49,801 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:49,967 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 19:52:49,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:49,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:49,973 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 44 treesize of output 19 [2021-06-12 19:52:49,974 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:50,129 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 19:52:50,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:50,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:50,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:50,135 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 [2021-06-12 19:52:50,135 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:50,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:50,140 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 21 treesize of output 7 [2021-06-12 19:52:50,141 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:50,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:50,292 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 19:52:50,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:50,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 18 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 19:52:50,299 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 28 variables, input treesize:1101, output treesize:264 [2021-06-12 19:52:50,477 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 19:52:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020439612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:50,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:50,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:52:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269358121] [2021-06-12 19:52:50,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:50,579 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) [2021-06-12 19:52:51,011 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-06-12 19:52:51,600 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2021-06-12 19:52:51,954 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 19:52:52,137 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 19:52:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:52,243 INFO L93 Difference]: Finished difference Result 234 states and 668 transitions. [2021-06-12 19:52:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:52:52,243 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 [2021-06-12 19:52:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:52,244 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:52:52,244 INFO L226 Difference]: Without dead ends: 222 [2021-06-12 19:52:52,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 2349.6ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-12 19:52:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2021-06-12 19:52:52,247 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) [2021-06-12 19:52:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 558 transitions. [2021-06-12 19:52:52,247 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 558 transitions. Word has length 17 [2021-06-12 19:52:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:52,247 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 558 transitions. [2021-06-12 19:52:52,247 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) [2021-06-12 19:52:52,247 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 558 transitions. [2021-06-12 19:52:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:52,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:52,248 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:52,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:52,457 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:52,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1517772714, now seen corresponding path program 30 times [2021-06-12 19:52:52,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:52,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53837367] [2021-06-12 19:52:52,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:52,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53837367] [2021-06-12 19:52:52,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53837367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:52,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570054113] [2021-06-12 19:52:52,606 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 [2021-06-12 19:52:52,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:52:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:52,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:52:52,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:52,720 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 25 treesize of output 19 [2021-06-12 19:52:52,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,723 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 27 treesize of output 21 [2021-06-12 19:52:52,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:52,726 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 17 treesize of output 13 [2021-06-12 19:52:52,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,729 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 15 treesize of output 11 [2021-06-12 19:52:52,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:52,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:52:52,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:125 [2021-06-12 19:52:52,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,838 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 28 treesize of output 22 [2021-06-12 19:52:52,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,842 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 15 treesize of output 11 [2021-06-12 19:52:52,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,847 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 29 treesize of output 23 [2021-06-12 19:52:52,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:52,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:52:52,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,855 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 38 treesize of output 30 [2021-06-12 19:52:52,856 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,860 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 25 treesize of output 19 [2021-06-12 19:52:52,861 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,865 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 25 treesize of output 19 [2021-06-12 19:52:52,865 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,869 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 35 treesize of output 27 [2021-06-12 19:52:52,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,875 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 27 treesize of output 21 [2021-06-12 19:52:52,876 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:52,879 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:52:52,879 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,018 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-12 19:52:53,018 INFO L628 ElimStorePlain]: treesize reduction 245, result has 46.6 percent of original size [2021-06-12 19:52:53,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,026 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 24 treesize of output 9 [2021-06-12 19:52:53,027 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,030 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 12 treesize of output 5 [2021-06-12 19:52:53,031 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:53,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,041 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 11 treesize of output 3 [2021-06-12 19:52:53,042 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,045 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 11 treesize of output 3 [2021-06-12 19:52:53,046 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,049 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 21 treesize of output 7 [2021-06-12 19:52:53,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,060 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 20 treesize of output 9 [2021-06-12 19:52:53,060 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:53,063 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 20 treesize of output 9 [2021-06-12 19:52:53,064 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:53,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:53,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:53,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:52:53,138 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:427, output treesize:140 [2021-06-12 19:52:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:53,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570054113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:53,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:53,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:52:53,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690004311] [2021-06-12 19:52:53,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:53,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:53,265 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) [2021-06-12 19:52:53,674 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 19:52:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:53,728 INFO L93 Difference]: Finished difference Result 212 states and 621 transitions. [2021-06-12 19:52:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:52:53,728 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 [2021-06-12 19:52:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:53,729 INFO L225 Difference]: With dead ends: 212 [2021-06-12 19:52:53,729 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 19:52:53,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 613.0ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 19:52:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-06-12 19:52:53,731 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) [2021-06-12 19:52:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 558 transitions. [2021-06-12 19:52:53,732 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 558 transitions. Word has length 17 [2021-06-12 19:52:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:53,732 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 558 transitions. [2021-06-12 19:52:53,732 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) [2021-06-12 19:52:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 558 transitions. [2021-06-12 19:52:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:53,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:53,732 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:53,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1378 [2021-06-12 19:52:53,933 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1096748704, now seen corresponding path program 31 times [2021-06-12 19:52:53,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:53,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213718437] [2021-06-12 19:52:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:54,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:54,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213718437] [2021-06-12 19:52:54,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213718437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:54,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472918994] [2021-06-12 19:52:54,225 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 [2021-06-12 19:52:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:54,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,449 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 17 treesize of output 13 [2021-06-12 19:52:54,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,453 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 15 treesize of output 11 [2021-06-12 19:52:54,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:54,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,496 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 27 treesize of output 21 [2021-06-12 19:52:54,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:54,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,501 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 [2021-06-12 19:52:54,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:54,545 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. [2021-06-12 19:52:54,546 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-12 19:52:54,761 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:52:54,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,765 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 27 treesize of output 21 [2021-06-12 19:52:54,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,774 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 [2021-06-12 19:52:54,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,779 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 37 treesize of output 29 [2021-06-12 19:52:54,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:54,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,784 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 25 treesize of output 19 [2021-06-12 19:52:54,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,789 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 35 treesize of output 27 [2021-06-12 19:52:54,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:54,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,795 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 18 treesize of output 14 [2021-06-12 19:52:54,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,801 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 27 treesize of output 21 [2021-06-12 19:52:54,802 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:54,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,806 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 25 treesize of output 19 [2021-06-12 19:52:54,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,812 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 17 treesize of output 13 [2021-06-12 19:52:54,813 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,817 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 28 treesize of output 22 [2021-06-12 19:52:54,818 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:55,061 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-06-12 19:52:55,062 INFO L628 ElimStorePlain]: treesize reduction 148, result has 71.4 percent of original size [2021-06-12 19:52:55,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,066 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 12 treesize of output 5 [2021-06-12 19:52:55,067 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,071 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 23 treesize of output 11 [2021-06-12 19:52:55,072 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,084 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 44 treesize of output 19 [2021-06-12 19:52:55,085 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,089 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 24 treesize of output 9 [2021-06-12 19:52:55,090 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:55,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,106 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 21 treesize of output 7 [2021-06-12 19:52:55,107 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,111 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 21 treesize of output 7 [2021-06-12 19:52:55,112 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:55,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,125 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 10 treesize of output 5 [2021-06-12 19:52:55,125 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,130 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 [2021-06-12 19:52:55,130 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,134 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 20 treesize of output 9 [2021-06-12 19:52:55,135 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,139 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 11 treesize of output 3 [2021-06-12 19:52:55,140 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,143 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 [2021-06-12 19:52:55,144 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:55,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:55,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:55,249 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:419, output treesize:179 [2021-06-12 19:52:55,394 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:52:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:55,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472918994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:55,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:55,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:52:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545915525] [2021-06-12 19:52:55,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:55,450 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) [2021-06-12 19:52:56,277 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 98 [2021-06-12 19:52:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:56,729 INFO L93 Difference]: Finished difference Result 252 states and 736 transitions. [2021-06-12 19:52:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:52:56,729 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 [2021-06-12 19:52:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:56,730 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:52:56,731 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:52:56,731 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1480.9ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:52:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:52:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 196. [2021-06-12 19:52:56,736 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) [2021-06-12 19:52:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 579 transitions. [2021-06-12 19:52:56,736 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 579 transitions. Word has length 17 [2021-06-12 19:52:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:56,736 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 579 transitions. [2021-06-12 19:52:56,736 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) [2021-06-12 19:52:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 579 transitions. [2021-06-12 19:52:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:52:56,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:56,737 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:56,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-06-12 19:52:56,937 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:56,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1716980722, now seen corresponding path program 32 times [2021-06-12 19:52:56,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:56,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756403010] [2021-06-12 19:52:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:57,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:57,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756403010] [2021-06-12 19:52:57,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756403010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:57,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391311759] [2021-06-12 19:52:57,113 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 [2021-06-12 19:52:57,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:57,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:52:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:57,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,370 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 [2021-06-12 19:52:57,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:52:57,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,380 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 [2021-06-12 19:52:57,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:52:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,387 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 [2021-06-12 19:52:57,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:57,473 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. [2021-06-12 19:52:57,474 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:183, output treesize:243 [2021-06-12 19:52:57,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,662 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 [2021-06-12 19:52:57,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:57,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,668 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 [2021-06-12 19:52:57,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,930 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2021-06-12 19:52:57,930 INFO L628 ElimStorePlain]: treesize reduction 233, result has 63.1 percent of original size [2021-06-12 19:52:57,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,935 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 10 treesize of output 5 [2021-06-12 19:52:57,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,940 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 20 treesize of output 9 [2021-06-12 19:52:57,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,056 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 19:52:58,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,061 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 27 treesize of output 21 [2021-06-12 19:52:58,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:52:58,173 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 19:52:58,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,181 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 21 treesize of output 7 [2021-06-12 19:52:58,181 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,185 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 11 treesize of output 3 [2021-06-12 19:52:58,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,304 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 19:52:58,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,309 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 48 treesize of output 38 [2021-06-12 19:52:58,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,315 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 28 treesize of output 22 [2021-06-12 19:52:58,316 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,321 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 28 treesize of output 22 [2021-06-12 19:52:58,322 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:52:58,327 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,332 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 30 treesize of output 24 [2021-06-12 19:52:58,333 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,337 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 30 treesize of output 24 [2021-06-12 19:52:58,338 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,510 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-12 19:52:58,510 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.9 percent of original size [2021-06-12 19:52:58,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,514 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 44 treesize of output 19 [2021-06-12 19:52:58,515 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,519 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 21 treesize of output 7 [2021-06-12 19:52:58,520 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,524 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 12 treesize of output 5 [2021-06-12 19:52:58,524 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:58,528 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 [2021-06-12 19:52:58,529 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,532 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 12 treesize of output 5 [2021-06-12 19:52:58,533 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,613 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 [2021-06-12 19:52:58,614 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:58,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:58,690 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-06-12 19:52:58,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:52:58,693 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:629, output treesize:151 [2021-06-12 19:52:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:58,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391311759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:58,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:58,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:58,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315535115] [2021-06-12 19:52:58,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:58,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:58,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:58,862 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) [2021-06-12 19:52:59,430 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-12 19:52:59,720 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2021-06-12 19:52:59,917 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-12 19:53:00,307 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-12 19:53:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:00,374 INFO L93 Difference]: Finished difference Result 272 states and 764 transitions. [2021-06-12 19:53:00,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:00,374 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 [2021-06-12 19:53:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:00,375 INFO L225 Difference]: With dead ends: 272 [2021-06-12 19:53:00,375 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:53:00,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1517.1ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:53:00,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 199. [2021-06-12 19:53:00,379 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) [2021-06-12 19:53:00,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-12 19:53:00,379 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-12 19:53:00,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:00,379 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-12 19:53:00,379 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) [2021-06-12 19:53:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-12 19:53:00,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:00,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:00,380 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:00,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-06-12 19:53:00,580 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:00,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2006531768, now seen corresponding path program 33 times [2021-06-12 19:53:00,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:00,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417212257] [2021-06-12 19:53:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:00,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:00,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417212257] [2021-06-12 19:53:00,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417212257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:00,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251715270] [2021-06-12 19:53:00,780 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 [2021-06-12 19:53:00,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:00,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:53:00,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:01,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:53:01,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:01,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,042 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 [2021-06-12 19:53:01,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,092 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 [2021-06-12 19:53:01,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,100 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 15 treesize of output 11 [2021-06-12 19:53:01,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,147 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. [2021-06-12 19:53:01,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:158, output treesize:148 [2021-06-12 19:53:01,376 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 55=[array_2]} [2021-06-12 19:53:01,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,382 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 15 treesize of output 11 [2021-06-12 19:53:01,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,387 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 28 treesize of output 22 [2021-06-12 19:53:01,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,393 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 35 treesize of output 27 [2021-06-12 19:53:01,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:01,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,400 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 25 treesize of output 19 [2021-06-12 19:53:01,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,406 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 35 treesize of output 27 [2021-06-12 19:53:01,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,414 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 25 treesize of output 19 [2021-06-12 19:53:01,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,424 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 38 treesize of output 30 [2021-06-12 19:53:01,426 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:01,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,432 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 [2021-06-12 19:53:01,432 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,438 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 19 treesize of output 15 [2021-06-12 19:53:01,439 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,444 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 29 treesize of output 23 [2021-06-12 19:53:01,445 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:01,702 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 104 [2021-06-12 19:53:01,702 INFO L628 ElimStorePlain]: treesize reduction 278, result has 58.8 percent of original size [2021-06-12 19:53:01,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,714 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 20 treesize of output 9 [2021-06-12 19:53:01,715 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,722 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 20 treesize of output 9 [2021-06-12 19:53:01,723 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,739 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 21 treesize of output 7 [2021-06-12 19:53:01,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,747 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 [2021-06-12 19:53:01,748 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,761 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 [2021-06-12 19:53:01,762 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,766 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 [2021-06-12 19:53:01,767 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,772 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 46 treesize of output 15 [2021-06-12 19:53:01,772 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,777 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 24 treesize of output 9 [2021-06-12 19:53:01,778 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,794 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 24 treesize of output 9 [2021-06-12 19:53:01,794 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,798 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 12 treesize of output 5 [2021-06-12 19:53:01,799 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,907 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 19:53:01,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:01,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:53:01,911 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:509, output treesize:199 [2021-06-12 19:53:02,060 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-06-12 19:53:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251715270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:02,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:02,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:53:02,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746938091] [2021-06-12 19:53:02,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:02,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:02,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:02,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:02,146 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) [2021-06-12 19:53:02,796 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-12 19:53:03,013 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2021-06-12 19:53:03,262 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-06-12 19:53:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:03,361 INFO L93 Difference]: Finished difference Result 340 states and 970 transitions. [2021-06-12 19:53:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:03,361 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 [2021-06-12 19:53:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:03,363 INFO L225 Difference]: With dead ends: 340 [2021-06-12 19:53:03,363 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 19:53:03,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1410.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 19:53:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 197. [2021-06-12 19:53:03,366 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) [2021-06-12 19:53:03,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 586 transitions. [2021-06-12 19:53:03,367 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 586 transitions. Word has length 17 [2021-06-12 19:53:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:03,367 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 586 transitions. [2021-06-12 19:53:03,367 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) [2021-06-12 19:53:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 586 transitions. [2021-06-12 19:53:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:03,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:03,368 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1463 [2021-06-12 19:53:03,573 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:03,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:03,573 INFO L82 PathProgramCache]: Analyzing trace with hash -150320166, now seen corresponding path program 34 times [2021-06-12 19:53:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:03,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983753092] [2021-06-12 19:53:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:03,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:03,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983753092] [2021-06-12 19:53:03,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983753092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:03,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250050744] [2021-06-12 19:53:03,773 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 [2021-06-12 19:53:03,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:03,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:03,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:03,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:04,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,035 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 17 treesize of output 13 [2021-06-12 19:53:04,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,040 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 27 treesize of output 21 [2021-06-12 19:53:04,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:04,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,045 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 [2021-06-12 19:53:04,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,050 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 17 treesize of output 13 [2021-06-12 19:53:04,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,054 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 15 treesize of output 11 [2021-06-12 19:53:04,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,059 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 25 treesize of output 19 [2021-06-12 19:53:04,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:04,149 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. [2021-06-12 19:53:04,149 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:249, output treesize:225 [2021-06-12 19:53:04,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,593 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 15 treesize of output 11 [2021-06-12 19:53:04,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,601 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 25 treesize of output 19 [2021-06-12 19:53:04,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,866 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-06-12 19:53:04,866 INFO L628 ElimStorePlain]: treesize reduction 170, result has 62.8 percent of original size [2021-06-12 19:53:04,866 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-06-12 19:53:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,872 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 19 treesize of output 15 [2021-06-12 19:53:04,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:04,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,959 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 19 treesize of output 15 [2021-06-12 19:53:04,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,965 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 [2021-06-12 19:53:04,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,970 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 21 treesize of output 17 [2021-06-12 19:53:04,971 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:04,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:04,976 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 30 treesize of output 24 [2021-06-12 19:53:04,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,049 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 11 treesize of output 3 [2021-06-12 19:53:05,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,121 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 11 treesize of output 3 [2021-06-12 19:53:05,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,127 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 [2021-06-12 19:53:05,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,133 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 12 treesize of output 5 [2021-06-12 19:53:05,133 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,138 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 [2021-06-12 19:53:05,139 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,208 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 27 treesize of output 21 [2021-06-12 19:53:05,209 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:05,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,284 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 20 treesize of output 9 [2021-06-12 19:53:05,284 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,288 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 10 treesize of output 5 [2021-06-12 19:53:05,289 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,366 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 7 treesize of output 5 [2021-06-12 19:53:05,367 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:05,435 INFO L518 ElimStorePlain]: Eliminatee v_prenex_413 vanished before elimination [2021-06-12 19:53:05,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:53:05,438 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 20 variables, input treesize:471, output treesize:62 [2021-06-12 19:53:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250050744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:05,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:05,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:53:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261587709] [2021-06-12 19:53:05,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:05,481 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) [2021-06-12 19:53:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:06,005 INFO L93 Difference]: Finished difference Result 239 states and 690 transitions. [2021-06-12 19:53:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:06,005 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 [2021-06-12 19:53:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:06,006 INFO L225 Difference]: With dead ends: 239 [2021-06-12 19:53:06,006 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 19:53:06,007 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:06,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 19:53:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 195. [2021-06-12 19:53:06,010 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) [2021-06-12 19:53:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 581 transitions. [2021-06-12 19:53:06,010 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 581 transitions. Word has length 17 [2021-06-12 19:53:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:06,010 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 581 transitions. [2021-06-12 19:53:06,010 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) [2021-06-12 19:53:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 581 transitions. [2021-06-12 19:53:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:06,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:06,011 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:06,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-06-12 19:53:06,221 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:06,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1618381758, now seen corresponding path program 35 times [2021-06-12 19:53:06,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:06,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951505925] [2021-06-12 19:53:06,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:06,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:06,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951505925] [2021-06-12 19:53:06,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951505925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:06,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843546414] [2021-06-12 19:53:06,458 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 [2021-06-12 19:53:06,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:06,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:06,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:06,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,612 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 27 treesize of output 21 [2021-06-12 19:53:06,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:06,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,617 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 [2021-06-12 19:53:06,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:06,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,621 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 15 treesize of output 11 [2021-06-12 19:53:06,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:06,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,625 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 17 treesize of output 13 [2021-06-12 19:53:06,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:06,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:06,684 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. [2021-06-12 19:53:06,684 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:195, output treesize:185 [2021-06-12 19:53:07,018 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-12 19:53:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:07,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:07,823 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 25 treesize of output 19 [2021-06-12 19:53:07,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:07,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:07,832 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 27 treesize of output 21 [2021-06-12 19:53:07,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:08,067 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 116 [2021-06-12 19:53:08,067 INFO L628 ElimStorePlain]: treesize reduction 169, result has 63.9 percent of original size [2021-06-12 19:53:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:08,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,170 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 19 treesize of output 15 [2021-06-12 19:53:08,170 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_439 vanished before elimination [2021-06-12 19:53:08,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,264 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 [2021-06-12 19:53:08,264 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,358 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 28 treesize of output 22 [2021-06-12 19:53:08,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,364 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 30 treesize of output 24 [2021-06-12 19:53:08,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,459 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 21 treesize of output 7 [2021-06-12 19:53:08,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,464 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 24 treesize of output 9 [2021-06-12 19:53:08,465 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,550 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 17 [2021-06-12 19:53:08,551 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,556 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 19 treesize of output 15 [2021-06-12 19:53:08,556 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,635 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 11 treesize of output 3 [2021-06-12 19:53:08,636 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,640 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 12 treesize of output 5 [2021-06-12 19:53:08,641 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:08,719 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,789 INFO L518 ElimStorePlain]: Eliminatee v_prenex_435 vanished before elimination [2021-06-12 19:53:08,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,794 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 10 treesize of output 5 [2021-06-12 19:53:08,795 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,799 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 20 treesize of output 9 [2021-06-12 19:53:08,800 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:08,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:53:08,880 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:466, output treesize:66 [2021-06-12 19:53:08,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:08,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843546414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:08,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:08,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:53:08,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58037471] [2021-06-12 19:53:08,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:08,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:08,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:08,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:08,929 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) [2021-06-12 19:53:09,436 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 19:53:09,736 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 123 [2021-06-12 19:53:09,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:09,849 INFO L93 Difference]: Finished difference Result 240 states and 691 transitions. [2021-06-12 19:53:09,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:09,849 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 [2021-06-12 19:53:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:09,850 INFO L225 Difference]: With dead ends: 240 [2021-06-12 19:53:09,850 INFO L226 Difference]: Without dead ends: 236 [2021-06-12 19:53:09,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1175.1ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-12 19:53:09,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 194. [2021-06-12 19:53:09,852 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) [2021-06-12 19:53:09,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 577 transitions. [2021-06-12 19:53:09,853 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 577 transitions. Word has length 17 [2021-06-12 19:53:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:09,853 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 577 transitions. [2021-06-12 19:53:09,853 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) [2021-06-12 19:53:09,853 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 577 transitions. [2021-06-12 19:53:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:09,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:09,853 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:10,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1560,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:10,057 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:10,057 INFO L82 PathProgramCache]: Analyzing trace with hash 952378238, now seen corresponding path program 36 times [2021-06-12 19:53:10,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:10,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805840523] [2021-06-12 19:53:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:10,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:10,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805840523] [2021-06-12 19:53:10,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805840523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:10,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612201498] [2021-06-12 19:53:10,349 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 [2021-06-12 19:53:10,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:10,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:10,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:10,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:10,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,520 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 [2021-06-12 19:53:10,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,524 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 25 treesize of output 19 [2021-06-12 19:53:10,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,528 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 27 treesize of output 21 [2021-06-12 19:53:10,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:10,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,532 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 [2021-06-12 19:53:10,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:10,603 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. [2021-06-12 19:53:10,603 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:223, output treesize:213 [2021-06-12 19:53:10,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,834 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 25 treesize of output 19 [2021-06-12 19:53:10,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:10,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:11,128 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-06-12 19:53:11,129 INFO L628 ElimStorePlain]: treesize reduction 200, result has 67.0 percent of original size [2021-06-12 19:53:11,133 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 7 treesize of output 5 [2021-06-12 19:53:11,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,260 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 19:53:11,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,265 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 28 treesize of output 22 [2021-06-12 19:53:11,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,271 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 19 treesize of output 15 [2021-06-12 19:53:11,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,277 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 21 treesize of output 17 [2021-06-12 19:53:11,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,282 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 30 treesize of output 24 [2021-06-12 19:53:11,283 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,397 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 19:53:11,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,403 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 12 treesize of output 5 [2021-06-12 19:53:11,404 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,409 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 21 treesize of output 7 [2021-06-12 19:53:11,409 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,414 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 11 treesize of output 3 [2021-06-12 19:53:11,415 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,420 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 24 treesize of output 9 [2021-06-12 19:53:11,420 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,536 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 19:53:11,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,537 INFO L518 ElimStorePlain]: Eliminatee v_prenex_450 vanished before elimination [2021-06-12 19:53:11,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,542 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 17 treesize of output 13 [2021-06-12 19:53:11,543 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,547 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 19 treesize of output 15 [2021-06-12 19:53:11,548 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,653 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 19:53:11,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,658 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 9 treesize of output 3 [2021-06-12 19:53:11,659 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,663 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 11 treesize of output 3 [2021-06-12 19:53:11,664 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,765 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 19:53:11,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,770 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 20 treesize of output 9 [2021-06-12 19:53:11,771 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,774 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 20 treesize of output 9 [2021-06-12 19:53:11,775 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:11,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:11,883 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 12 variables, input treesize:536, output treesize:204 [2021-06-12 19:53:12,024 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-12 19:53:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:12,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612201498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:12,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:12,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:53:12,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191746320] [2021-06-12 19:53:12,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:12,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:12,092 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) [2021-06-12 19:53:12,673 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-12 19:53:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:12,741 INFO L93 Difference]: Finished difference Result 249 states and 719 transitions. [2021-06-12 19:53:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:12,741 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 [2021-06-12 19:53:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:12,742 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:53:12,742 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:53:12,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 966.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:12,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:53:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2021-06-12 19:53:12,744 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) [2021-06-12 19:53:12,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 561 transitions. [2021-06-12 19:53:12,744 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 561 transitions. Word has length 17 [2021-06-12 19:53:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:12,744 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 561 transitions. [2021-06-12 19:53:12,744 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) [2021-06-12 19:53:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 561 transitions. [2021-06-12 19:53:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:12,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:12,745 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:12,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1703,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:12,945 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1965452058, now seen corresponding path program 37 times [2021-06-12 19:53:12,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:12,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640059804] [2021-06-12 19:53:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:13,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640059804] [2021-06-12 19:53:13,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640059804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:13,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959133410] [2021-06-12 19:53:13,158 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) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:13,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:13,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,328 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 15 treesize of output 11 [2021-06-12 19:53:13,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,332 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 17 treesize of output 13 [2021-06-12 19:53:13,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:13,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,380 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 27 treesize of output 21 [2021-06-12 19:53:13,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:13,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,384 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 25 treesize of output 19 [2021-06-12 19:53:13,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:13,432 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. [2021-06-12 19:53:13,432 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:155, output treesize:143 [2021-06-12 19:53:13,649 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 36=[array_0]} [2021-06-12 19:53:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,654 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 27 treesize of output 21 [2021-06-12 19:53:13,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,660 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 [2021-06-12 19:53:13,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,666 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 35 treesize of output 27 [2021-06-12 19:53:13,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:13,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,673 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 17 treesize of output 13 [2021-06-12 19:53:13,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,679 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 18 treesize of output 14 [2021-06-12 19:53:13,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,690 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 37 treesize of output 29 [2021-06-12 19:53:13,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,697 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 15 treesize of output 11 [2021-06-12 19:53:13,697 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,702 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 [2021-06-12 19:53:13,712 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:13,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,718 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 28 treesize of output 22 [2021-06-12 19:53:13,720 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:13,726 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 25 treesize of output 19 [2021-06-12 19:53:13,727 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,963 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 86 [2021-06-12 19:53:13,964 INFO L628 ElimStorePlain]: treesize reduction 154, result has 70.3 percent of original size [2021-06-12 19:53:13,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,969 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 23 treesize of output 11 [2021-06-12 19:53:13,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,984 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 12 treesize of output 5 [2021-06-12 19:53:13,985 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:14,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,002 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 11 treesize of output 3 [2021-06-12 19:53:14,002 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,008 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 21 treesize of output 7 [2021-06-12 19:53:14,009 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:14,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,025 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 21 treesize of output 7 [2021-06-12 19:53:14,026 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,032 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 [2021-06-12 19:53:14,033 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:14,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,048 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 20 treesize of output 9 [2021-06-12 19:53:14,049 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,055 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 10 treesize of output 5 [2021-06-12 19:53:14,056 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,062 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 24 treesize of output 9 [2021-06-12 19:53:14,062 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,068 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 44 treesize of output 19 [2021-06-12 19:53:14,069 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:14,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:14,090 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 9 treesize of output 3 [2021-06-12 19:53:14,091 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:14,197 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 19:53:14,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:14,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:14,201 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:419, output treesize:179 [2021-06-12 19:53:14,348 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:53:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:14,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959133410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:14,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:14,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:53:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543444142] [2021-06-12 19:53:14,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:14,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:14,402 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) [2021-06-12 19:53:14,962 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-06-12 19:53:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:15,014 INFO L93 Difference]: Finished difference Result 220 states and 644 transitions. [2021-06-12 19:53:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:53:15,014 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 [2021-06-12 19:53:15,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:15,014 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:53:15,014 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:53:15,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:53:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 194. [2021-06-12 19:53:15,017 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) [2021-06-12 19:53:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 573 transitions. [2021-06-12 19:53:15,017 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 573 transitions. Word has length 17 [2021-06-12 19:53:15,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:15,017 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 573 transitions. [2021-06-12 19:53:15,017 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) [2021-06-12 19:53:15,017 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 573 transitions. [2021-06-12 19:53:15,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:15,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:15,018 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:15,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:15,218 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:15,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:15,218 INFO L82 PathProgramCache]: Analyzing trace with hash -848277368, now seen corresponding path program 38 times [2021-06-12 19:53:15,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:15,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065524434] [2021-06-12 19:53:15,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:15,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:15,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065524434] [2021-06-12 19:53:15,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065524434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:15,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834477809] [2021-06-12 19:53:15,483 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 [2021-06-12 19:53:15,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:15,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:15,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,678 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 [2021-06-12 19:53:15,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,682 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 35 treesize of output 27 [2021-06-12 19:53:15,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:15,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:15,688 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,691 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 [2021-06-12 19:53:15,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:15,767 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. [2021-06-12 19:53:15,767 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:171, output treesize:231 [2021-06-12 19:53:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,933 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 [2021-06-12 19:53:15,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,938 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 27 treesize of output 21 [2021-06-12 19:53:15,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:16,197 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 83 [2021-06-12 19:53:16,198 INFO L628 ElimStorePlain]: treesize reduction 221, result has 63.7 percent of original size [2021-06-12 19:53:16,202 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 7 treesize of output 5 [2021-06-12 19:53:16,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,311 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 19:53:16,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,316 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 [2021-06-12 19:53:16,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,320 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 [2021-06-12 19:53:16,321 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,435 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 19:53:16,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,435 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:53:16,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,440 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 48 treesize of output 38 [2021-06-12 19:53:16,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,446 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 28 treesize of output 22 [2021-06-12 19:53:16,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,451 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 30 treesize of output 24 [2021-06-12 19:53:16,452 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,457 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 30 treesize of output 24 [2021-06-12 19:53:16,458 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,463 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 [2021-06-12 19:53:16,464 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:16,468 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,635 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 19:53:16,636 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.6 percent of original size [2021-06-12 19:53:16,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,639 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 44 treesize of output 19 [2021-06-12 19:53:16,640 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,644 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 21 treesize of output 7 [2021-06-12 19:53:16,644 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,648 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 21 treesize of output 7 [2021-06-12 19:53:16,649 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,653 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 [2021-06-12 19:53:16,653 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,656 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 12 treesize of output 5 [2021-06-12 19:53:16,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,736 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 [2021-06-12 19:53:16,737 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:16,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:16,818 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 20 treesize of output 9 [2021-06-12 19:53:16,819 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,822 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 10 treesize of output 5 [2021-06-12 19:53:16,822 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:16,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:16,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:16,908 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-06-12 19:53:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:17,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834477809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:17,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:17,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:53:17,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645359969] [2021-06-12 19:53:17,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:17,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:17,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:17,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:17,042 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) [2021-06-12 19:53:17,416 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-06-12 19:53:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:17,564 INFO L93 Difference]: Finished difference Result 229 states and 658 transitions. [2021-06-12 19:53:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:17,565 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 [2021-06-12 19:53:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:17,565 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:53:17,565 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:53:17,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:53:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:53:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 197. [2021-06-12 19:53:17,568 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) [2021-06-12 19:53:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 585 transitions. [2021-06-12 19:53:17,568 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 585 transitions. Word has length 17 [2021-06-12 19:53:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:17,568 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 585 transitions. [2021-06-12 19:53:17,568 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) [2021-06-12 19:53:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 585 transitions. [2021-06-12 19:53:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:17,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:17,569 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:17,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1790,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:17,769 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1775713912, now seen corresponding path program 39 times [2021-06-12 19:53:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:17,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484135275] [2021-06-12 19:53:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:17,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484135275] [2021-06-12 19:53:17,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484135275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309907271] [2021-06-12 19:53:17,995 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 [2021-06-12 19:53:18,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:53:18,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:18,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,226 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 17 treesize of output 13 [2021-06-12 19:53:18,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,230 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 [2021-06-12 19:53:18,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,298 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 [2021-06-12 19:53:18,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,302 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 17 treesize of output 13 [2021-06-12 19:53:18,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,361 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 [2021-06-12 19:53:18,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,365 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 27 treesize of output 21 [2021-06-12 19:53:18,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:18,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,432 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. [2021-06-12 19:53:18,432 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-06-12 19:53:18,663 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]} [2021-06-12 19:53:18,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:18,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:18,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:18,841 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2021-06-12 19:53:18,842 INFO L628 ElimStorePlain]: treesize reduction 137, result has 63.5 percent of original size [2021-06-12 19:53:18,846 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 7 treesize of output 5 [2021-06-12 19:53:18,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:18,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,975 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 [2021-06-12 19:53:18,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:19,039 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 21 treesize of output 17 [2021-06-12 19:53:19,039 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,043 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 30 treesize of output 24 [2021-06-12 19:53:19,044 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:19,048 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,051 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 28 treesize of output 22 [2021-06-12 19:53:19,052 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:19,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,106 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 20 treesize of output 9 [2021-06-12 19:53:19,106 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,110 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 10 treesize of output 5 [2021-06-12 19:53:19,110 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:19,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:19,166 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:19,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,169 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 11 treesize of output 3 [2021-06-12 19:53:19,170 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:19,218 INFO L518 ElimStorePlain]: Eliminatee v_prenex_485 vanished before elimination [2021-06-12 19:53:19,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,222 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 12 treesize of output 5 [2021-06-12 19:53:19,222 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,226 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 11 treesize of output 3 [2021-06-12 19:53:19,227 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,230 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 21 treesize of output 7 [2021-06-12 19:53:19,231 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:19,234 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 [2021-06-12 19:53:19,234 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:19,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:19,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:53:19,282 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 15 variables, input treesize:373, output treesize:71 [2021-06-12 19:53:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:19,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309907271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:19,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:19,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:53:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156044071] [2021-06-12 19:53:19,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:19,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:19,332 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) [2021-06-12 19:53:20,011 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-12 19:53:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:20,093 INFO L93 Difference]: Finished difference Result 229 states and 650 transitions. [2021-06-12 19:53:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:20,094 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 [2021-06-12 19:53:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:20,094 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:53:20,094 INFO L226 Difference]: Without dead ends: 221 [2021-06-12 19:53:20,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:20,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-12 19:53:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 191. [2021-06-12 19:53:20,097 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) [2021-06-12 19:53:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 564 transitions. [2021-06-12 19:53:20,098 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 564 transitions. Word has length 17 [2021-06-12 19:53:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:20,098 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 564 transitions. [2021-06-12 19:53:20,098 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) [2021-06-12 19:53:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 564 transitions. [2021-06-12 19:53:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:20,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:20,099 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:20,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1824 [2021-06-12 19:53:20,299 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:20,299 INFO L82 PathProgramCache]: Analyzing trace with hash -299360958, now seen corresponding path program 40 times [2021-06-12 19:53:20,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:20,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988002783] [2021-06-12 19:53:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:20,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988002783] [2021-06-12 19:53:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988002783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855192175] [2021-06-12 19:53:20,567 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 [2021-06-12 19:53:20,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:20,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,694 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 [2021-06-12 19:53:20,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:20,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,698 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 17 treesize of output 13 [2021-06-12 19:53:20,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,702 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 [2021-06-12 19:53:20,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,707 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 [2021-06-12 19:53:20,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:20,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:20,753 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. [2021-06-12 19:53:20,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:135 [2021-06-12 19:53:21,062 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:53:21,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,066 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 25 treesize of output 19 [2021-06-12 19:53:21,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,071 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 27 treesize of output 21 [2021-06-12 19:53:21,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:21,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,076 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 [2021-06-12 19:53:21,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,081 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 [2021-06-12 19:53:21,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:21,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,086 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 37 treesize of output 29 [2021-06-12 19:53:21,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,092 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 17 treesize of output 13 [2021-06-12 19:53:21,093 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,098 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 18 treesize of output 14 [2021-06-12 19:53:21,098 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,103 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 25 treesize of output 19 [2021-06-12 19:53:21,103 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,107 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 35 treesize of output 27 [2021-06-12 19:53:21,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:21,113 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 15 treesize of output 11 [2021-06-12 19:53:21,114 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,348 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-06-12 19:53:21,348 INFO L628 ElimStorePlain]: treesize reduction 144, result has 71.3 percent of original size [2021-06-12 19:53:21,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,353 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 [2021-06-12 19:53:21,353 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,358 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 44 treesize of output 19 [2021-06-12 19:53:21,358 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,363 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 24 treesize of output 9 [2021-06-12 19:53:21,363 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:21,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,379 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 12 treesize of output 5 [2021-06-12 19:53:21,380 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,384 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 23 treesize of output 11 [2021-06-12 19:53:21,385 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,396 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 21 treesize of output 7 [2021-06-12 19:53:21,397 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,401 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 [2021-06-12 19:53:21,401 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:21,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,413 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 21 treesize of output 7 [2021-06-12 19:53:21,413 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,417 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 11 treesize of output 3 [2021-06-12 19:53:21,418 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,429 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 10 treesize of output 5 [2021-06-12 19:53:21,430 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,433 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 9 treesize of output 3 [2021-06-12 19:53:21,433 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:21,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:21,530 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:403, output treesize:179 [2021-06-12 19:53:21,670 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:53:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855192175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:21,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:21,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:53:21,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270916465] [2021-06-12 19:53:21,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:21,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:21,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:21,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:21,730 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) [2021-06-12 19:53:22,218 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2021-06-12 19:53:22,418 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:53:22,700 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:53:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:22,758 INFO L93 Difference]: Finished difference Result 230 states and 666 transitions. [2021-06-12 19:53:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:53:22,758 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 [2021-06-12 19:53:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:22,759 INFO L225 Difference]: With dead ends: 230 [2021-06-12 19:53:22,759 INFO L226 Difference]: Without dead ends: 222 [2021-06-12 19:53:22,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1283.6ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-12 19:53:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 193. [2021-06-12 19:53:22,761 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) [2021-06-12 19:53:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-06-12 19:53:22,761 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-06-12 19:53:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:22,761 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-06-12 19:53:22,762 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) [2021-06-12 19:53:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-06-12 19:53:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:22,762 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:22,762 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:22,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1873,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:22,962 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1114167112, now seen corresponding path program 41 times [2021-06-12 19:53:22,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:22,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041957192] [2021-06-12 19:53:22,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:23,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:23,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041957192] [2021-06-12 19:53:23,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041957192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915747121] [2021-06-12 19:53:23,195 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 [2021-06-12 19:53:23,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:23,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:23,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:23,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,330 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 [2021-06-12 19:53:23,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,334 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 25 treesize of output 19 [2021-06-12 19:53:23,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,338 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 17 treesize of output 13 [2021-06-12 19:53:23,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,341 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 27 treesize of output 21 [2021-06-12 19:53:23,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:23,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:23,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:53:23,386 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:53:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,563 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 29 treesize of output 23 [2021-06-12 19:53:23,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:23,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,571 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 25 treesize of output 19 [2021-06-12 19:53:23,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,578 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 38 treesize of output 30 [2021-06-12 19:53:23,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:23,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,587 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 [2021-06-12 19:53:23,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:23,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,594 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 35 treesize of output 27 [2021-06-12 19:53:23,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:23,816 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2021-06-12 19:53:23,816 INFO L628 ElimStorePlain]: treesize reduction 234, result has 57.8 percent of original size [2021-06-12 19:53:23,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,821 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 12 treesize of output 5 [2021-06-12 19:53:23,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,825 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 [2021-06-12 19:53:23,826 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:23,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:23,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,844 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 21 treesize of output 7 [2021-06-12 19:53:23,845 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,848 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 21 treesize of output 7 [2021-06-12 19:53:23,849 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:23,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,860 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 20 treesize of output 9 [2021-06-12 19:53:23,860 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,864 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 [2021-06-12 19:53:23,864 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:23,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,959 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 [2021-06-12 19:53:23,960 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,964 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 19 treesize of output 15 [2021-06-12 19:53:23,964 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,967 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 7 treesize of output 5 [2021-06-12 19:53:23,968 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:24,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:24,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:24,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:24,049 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 11 treesize of output 3 [2021-06-12 19:53:24,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:24,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:24,053 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 21 treesize of output 7 [2021-06-12 19:53:24,053 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:24,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:24,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:53:24,134 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:424, output treesize:140 [2021-06-12 19:53:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:24,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915747121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:24,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:24,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:53:24,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626328006] [2021-06-12 19:53:24,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:24,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:24,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:24,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:24,271 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) [2021-06-12 19:53:24,871 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 19:53:25,105 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-12 19:53:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:25,164 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-06-12 19:53:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:25,164 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 [2021-06-12 19:53:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:25,165 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:53:25,165 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:53:25,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1051.8ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:53:25,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:53:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2021-06-12 19:53:25,167 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) [2021-06-12 19:53:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 564 transitions. [2021-06-12 19:53:25,167 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 564 transitions. Word has length 17 [2021-06-12 19:53:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:25,167 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 564 transitions. [2021-06-12 19:53:25,167 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) [2021-06-12 19:53:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 564 transitions. [2021-06-12 19:53:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:25,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:25,168 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:25,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1914,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:25,368 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash -92267976, now seen corresponding path program 42 times [2021-06-12 19:53:25,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:25,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801044019] [2021-06-12 19:53:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:25,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:25,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801044019] [2021-06-12 19:53:25,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801044019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:25,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239411280] [2021-06-12 19:53:25,585 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 [2021-06-12 19:53:25,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:25,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,715 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 17 treesize of output 13 [2021-06-12 19:53:25,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:25,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,719 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 15 treesize of output 11 [2021-06-12 19:53:25,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,724 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 25 treesize of output 19 [2021-06-12 19:53:25,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:25,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,728 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 27 treesize of output 21 [2021-06-12 19:53:25,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:25,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:25,786 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. [2021-06-12 19:53:25,787 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:177, output treesize:167 [2021-06-12 19:53:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,361 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 [2021-06-12 19:53:26,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,368 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 15 treesize of output 11 [2021-06-12 19:53:26,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,659 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 106 [2021-06-12 19:53:26,659 INFO L628 ElimStorePlain]: treesize reduction 154, result has 62.4 percent of original size [2021-06-12 19:53:26,659 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-12 19:53:26,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,664 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 19 treesize of output 15 [2021-06-12 19:53:26,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:26,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,748 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 [2021-06-12 19:53:26,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:26,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,830 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 30 treesize of output 24 [2021-06-12 19:53:26,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,836 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 [2021-06-12 19:53:26,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:26,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,912 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 24 treesize of output 9 [2021-06-12 19:53:26,912 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,917 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 [2021-06-12 19:53:26,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:26,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,990 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 27 treesize of output 21 [2021-06-12 19:53:26,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:27,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:27,064 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 7 treesize of output 5 [2021-06-12 19:53:27,064 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,136 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 10 treesize of output 5 [2021-06-12 19:53:27,137 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,141 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 20 treesize of output 9 [2021-06-12 19:53:27,142 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:27,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:27,215 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-12 19:53:27,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,220 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 19 treesize of output 15 [2021-06-12 19:53:27,221 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,225 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 21 treesize of output 17 [2021-06-12 19:53:27,226 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,293 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 12 treesize of output 5 [2021-06-12 19:53:27,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,298 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 11 treesize of output 3 [2021-06-12 19:53:27,298 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:27,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:53:27,359 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:424, output treesize:62 [2021-06-12 19:53:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:27,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239411280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:27,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:27,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:53:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165828365] [2021-06-12 19:53:27,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:27,405 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) [2021-06-12 19:53:27,785 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-12 19:53:28,244 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2021-06-12 19:53:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:28,422 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-06-12 19:53:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:28,423 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 [2021-06-12 19:53:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:28,423 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:53:28,423 INFO L226 Difference]: Without dead ends: 210 [2021-06-12 19:53:28,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1186.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-06-12 19:53:28,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2021-06-12 19:53:28,425 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) [2021-06-12 19:53:28,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 578 transitions. [2021-06-12 19:53:28,426 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 578 transitions. Word has length 17 [2021-06-12 19:53:28,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:28,426 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 578 transitions. [2021-06-12 19:53:28,426 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) [2021-06-12 19:53:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 578 transitions. [2021-06-12 19:53:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:28,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:28,426 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:28,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1941 [2021-06-12 19:53:28,627 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:28,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1323400916, now seen corresponding path program 43 times [2021-06-12 19:53:28,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:28,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736887515] [2021-06-12 19:53:28,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:28,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736887515] [2021-06-12 19:53:28,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736887515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119216927] [2021-06-12 19:53:28,906 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 [2021-06-12 19:53:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:28,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,071 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 [2021-06-12 19:53:29,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,075 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 35 treesize of output 27 [2021-06-12 19:53:29,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,080 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 [2021-06-12 19:53:29,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,084 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 [2021-06-12 19:53:29,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:29,158 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. [2021-06-12 19:53:29,158 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:171, output treesize:231 [2021-06-12 19:53:29,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,330 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 [2021-06-12 19:53:29,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,335 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 [2021-06-12 19:53:29,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,583 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-06-12 19:53:29,583 INFO L628 ElimStorePlain]: treesize reduction 221, result has 62.6 percent of original size [2021-06-12 19:53:29,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,588 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 27 treesize of output 21 [2021-06-12 19:53:29,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:29,699 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 19:53:29,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:29,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,704 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 11 treesize of output 3 [2021-06-12 19:53:29,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,708 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 21 treesize of output 7 [2021-06-12 19:53:29,709 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:29,826 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 19:53:29,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,830 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 27 treesize of output 21 [2021-06-12 19:53:29,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:29,946 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-06-12 19:53:29,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:29,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,950 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 10 treesize of output 5 [2021-06-12 19:53:29,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,955 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 20 treesize of output 9 [2021-06-12 19:53:29,955 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:30,072 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-12 19:53:30,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:30,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,077 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 30 treesize of output 24 [2021-06-12 19:53:30,078 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,083 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 48 treesize of output 38 [2021-06-12 19:53:30,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,088 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 [2021-06-12 19:53:30,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,098 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 28 treesize of output 22 [2021-06-12 19:53:30,099 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,104 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 30 treesize of output 24 [2021-06-12 19:53:30,105 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,108 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:30,109 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,278 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 19:53:30,278 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.4 percent of original size [2021-06-12 19:53:30,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,282 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 44 treesize of output 19 [2021-06-12 19:53:30,287 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,291 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 12 treesize of output 5 [2021-06-12 19:53:30,292 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,295 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 12 treesize of output 5 [2021-06-12 19:53:30,296 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,299 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 21 treesize of output 7 [2021-06-12 19:53:30,300 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,303 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 21 treesize of output 7 [2021-06-12 19:53:30,303 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:30,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_524 vanished before elimination [2021-06-12 19:53:30,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:30,382 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:605, output treesize:139 [2021-06-12 19:53:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:30,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119216927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:30,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:30,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:53:30,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988528997] [2021-06-12 19:53:30,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:30,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:30,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:30,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:30,542 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) [2021-06-12 19:53:30,941 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-06-12 19:53:31,155 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2021-06-12 19:53:31,418 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-12 19:53:31,713 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 19:53:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:31,784 INFO L93 Difference]: Finished difference Result 235 states and 673 transitions. [2021-06-12 19:53:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:31,784 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 [2021-06-12 19:53:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:31,784 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:53:31,784 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:53:31,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1397.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:53:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 193. [2021-06-12 19:53:31,787 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) [2021-06-12 19:53:31,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 570 transitions. [2021-06-12 19:53:31,787 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 570 transitions. Word has length 17 [2021-06-12 19:53:31,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:31,787 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 570 transitions. [2021-06-12 19:53:31,787 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) [2021-06-12 19:53:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 570 transitions. [2021-06-12 19:53:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:31,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:31,788 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:31,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2008 [2021-06-12 19:53:31,988 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash 250315536, now seen corresponding path program 44 times [2021-06-12 19:53:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:31,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251812615] [2021-06-12 19:53:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:31,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:32,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:32,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251812615] [2021-06-12 19:53:32,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251812615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:32,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086799949] [2021-06-12 19:53:32,148 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 [2021-06-12 19:53:32,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:32,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:32,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:32,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,254 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 [2021-06-12 19:53:32,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,258 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 [2021-06-12 19:53:32,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:32,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,262 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 17 treesize of output 13 [2021-06-12 19:53:32,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,265 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 15 treesize of output 11 [2021-06-12 19:53:32,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:32,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:53:32,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-12 19:53:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,528 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 25 treesize of output 19 [2021-06-12 19:53:32,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,533 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 35 treesize of output 27 [2021-06-12 19:53:32,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:32,766 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 78 [2021-06-12 19:53:32,766 INFO L628 ElimStorePlain]: treesize reduction 151, result has 68.4 percent of original size [2021-06-12 19:53:32,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,771 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 38 treesize of output 30 [2021-06-12 19:53:32,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,778 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 [2021-06-12 19:53:32,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:32,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,784 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 28 treesize of output 22 [2021-06-12 19:53:32,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,789 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 19 treesize of output 15 [2021-06-12 19:53:32,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,895 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 19:53:32,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:32,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 19:53:32,901 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,905 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 11 treesize of output 3 [2021-06-12 19:53:32,906 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,911 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 12 treesize of output 5 [2021-06-12 19:53:32,911 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,916 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 24 treesize of output 9 [2021-06-12 19:53:32,917 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:32,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,930 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 44 treesize of output 19 [2021-06-12 19:53:32,931 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,935 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 23 treesize of output 11 [2021-06-12 19:53:32,935 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,051 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 21 treesize of output 7 [2021-06-12 19:53:33,052 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,056 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 21 treesize of output 7 [2021-06-12 19:53:33,056 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,169 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 19:53:33,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,173 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 7 treesize of output 5 [2021-06-12 19:53:33,174 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,276 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 19:53:33,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_532 vanished before elimination [2021-06-12 19:53:33,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:53:33,282 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:33,288 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,398 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-12 19:53:33,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,402 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 10 treesize of output 5 [2021-06-12 19:53:33,403 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,407 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 20 treesize of output 9 [2021-06-12 19:53:33,408 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,418 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 [2021-06-12 19:53:33,419 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:33,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:33,514 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:404, output treesize:176 [2021-06-12 19:53:33,647 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:53:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:33,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086799949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:33,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:33,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:53:33,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578363438] [2021-06-12 19:53:33,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:33,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:33,715 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) [2021-06-12 19:53:34,021 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-12 19:53:34,164 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-12 19:53:34,351 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 19:53:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:34,389 INFO L93 Difference]: Finished difference Result 224 states and 647 transitions. [2021-06-12 19:53:34,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:34,389 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 [2021-06-12 19:53:34,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:34,390 INFO L225 Difference]: With dead ends: 224 [2021-06-12 19:53:34,390 INFO L226 Difference]: Without dead ends: 216 [2021-06-12 19:53:34,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 862.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:34,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-12 19:53:34,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 192. [2021-06-12 19:53:34,392 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) [2021-06-12 19:53:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 568 transitions. [2021-06-12 19:53:34,393 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 568 transitions. Word has length 17 [2021-06-12 19:53:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:34,393 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 568 transitions. [2021-06-12 19:53:34,393 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) [2021-06-12 19:53:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 568 transitions. [2021-06-12 19:53:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:34,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:34,393 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:34,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:34,605 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:34,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash -326980856, now seen corresponding path program 45 times [2021-06-12 19:53:34,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:34,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120785971] [2021-06-12 19:53:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:34,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120785971] [2021-06-12 19:53:34,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120785971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415764424] [2021-06-12 19:53:34,888 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 [2021-06-12 19:53:34,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:34,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,967 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 27 treesize of output 21 [2021-06-12 19:53:34,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:34,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,971 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 15 treesize of output 11 [2021-06-12 19:53:34,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,975 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 25 treesize of output 19 [2021-06-12 19:53:34,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:34,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,978 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 17 treesize of output 13 [2021-06-12 19:53:34,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:35,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:53:35,023 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:53:35,500 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]} [2021-06-12 19:53:35,506 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 28 treesize of output 22 [2021-06-12 19:53:35,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:35,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,714 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 88 [2021-06-12 19:53:35,715 INFO L628 ElimStorePlain]: treesize reduction 141, result has 59.8 percent of original size [2021-06-12 19:53:35,719 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 21 treesize of output 17 [2021-06-12 19:53:35,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,724 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 [2021-06-12 19:53:35,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:35,778 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 7 treesize of output 5 [2021-06-12 19:53:35,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:35,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:35,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:35,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:35,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:35,933 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 27 treesize of output 21 [2021-06-12 19:53:35,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:35,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:35,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:35,988 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 11 treesize of output 3 [2021-06-12 19:53:35,989 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:35,993 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 [2021-06-12 19:53:35,993 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:36,043 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:36,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,047 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 11 treesize of output 3 [2021-06-12 19:53:36,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:36,100 INFO L518 ElimStorePlain]: Eliminatee v_prenex_552 vanished before elimination [2021-06-12 19:53:36,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,104 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 [2021-06-12 19:53:36,105 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,108 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 [2021-06-12 19:53:36,108 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:36,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,165 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 21 treesize of output 7 [2021-06-12 19:53:36,166 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,169 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 24 treesize of output 9 [2021-06-12 19:53:36,170 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:36,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:53:36,218 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 18 variables, input treesize:364, output treesize:62 [2021-06-12 19:53:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415764424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:36,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:53:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977116681] [2021-06-12 19:53:36,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:36,264 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) [2021-06-12 19:53:36,624 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-12 19:53:36,870 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2021-06-12 19:53:37,038 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-12 19:53:37,618 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 126 [2021-06-12 19:53:37,897 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2021-06-12 19:53:38,063 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-12 19:53:38,332 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 103 [2021-06-12 19:53:38,617 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 109 [2021-06-12 19:53:38,868 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-12 19:53:39,072 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 19:53:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:39,172 INFO L93 Difference]: Finished difference Result 304 states and 869 transitions. [2021-06-12 19:53:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:39,172 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 [2021-06-12 19:53:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:39,173 INFO L225 Difference]: With dead ends: 304 [2021-06-12 19:53:39,173 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 19:53:39,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2957.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:53:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 19:53:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-12 19:53:39,176 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) [2021-06-12 19:53:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 590 transitions. [2021-06-12 19:53:39,176 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 590 transitions. Word has length 17 [2021-06-12 19:53:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:39,177 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 590 transitions. [2021-06-12 19:53:39,177 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) [2021-06-12 19:53:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 590 transitions. [2021-06-12 19:53:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:39,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:39,177 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:39,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2112 [2021-06-12 19:53:39,393 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:39,393 INFO L82 PathProgramCache]: Analyzing trace with hash 211426140, now seen corresponding path program 46 times [2021-06-12 19:53:39,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:39,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67978414] [2021-06-12 19:53:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:39,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:39,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67978414] [2021-06-12 19:53:39,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67978414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:39,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729087980] [2021-06-12 19:53:39,596 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 [2021-06-12 19:53:39,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:39,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,706 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 15 treesize of output 11 [2021-06-12 19:53:39,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,711 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 27 treesize of output 21 [2021-06-12 19:53:39,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:39,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,716 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 [2021-06-12 19:53:39,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,720 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 17 treesize of output 13 [2021-06-12 19:53:39,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:39,782 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. [2021-06-12 19:53:39,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:177, output treesize:167 [2021-06-12 19:53:40,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,066 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 15 treesize of output 11 [2021-06-12 19:53:40,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,073 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 [2021-06-12 19:53:40,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,355 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 108 [2021-06-12 19:53:40,356 INFO L628 ElimStorePlain]: treesize reduction 101, result has 78.0 percent of original size [2021-06-12 19:53:40,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_559 vanished before elimination [2021-06-12 19:53:40,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,362 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 19 treesize of output 15 [2021-06-12 19:53:40,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,368 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 29 treesize of output 23 [2021-06-12 19:53:40,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:40,493 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 19:53:40,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:40,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:40,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:40,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,506 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 28 treesize of output 22 [2021-06-12 19:53:40,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,635 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 19:53:40,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,641 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 11 treesize of output 3 [2021-06-12 19:53:40,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,647 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 12 treesize of output 5 [2021-06-12 19:53:40,648 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,653 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 24 treesize of output 9 [2021-06-12 19:53:40,654 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:40,795 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 19:53:40,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:40,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,807 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 46 treesize of output 15 [2021-06-12 19:53:40,808 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,813 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 24 treesize of output 9 [2021-06-12 19:53:40,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,831 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 21 treesize of output 7 [2021-06-12 19:53:40,832 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,953 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 19:53:40,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:40,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,959 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 17 treesize of output 13 [2021-06-12 19:53:40,960 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,965 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 27 treesize of output 21 [2021-06-12 19:53:40,966 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:41,082 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 19:53:41,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:41,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,088 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 9 treesize of output 3 [2021-06-12 19:53:41,088 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,094 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 [2021-06-12 19:53:41,094 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,099 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 11 treesize of output 3 [2021-06-12 19:53:41,100 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:41,224 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-06-12 19:53:41,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:41,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,228 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 [2021-06-12 19:53:41,229 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:41,352 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 19:53:41,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:41,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,357 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 [2021-06-12 19:53:41,357 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,361 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 10 treesize of output 5 [2021-06-12 19:53:41,362 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:41,485 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 19:53:41,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:41,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:41,489 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 15 variables, input treesize:474, output treesize:222 [2021-06-12 19:53:41,652 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-12 19:53:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:41,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729087980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:41,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:41,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:53:41,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855789581] [2021-06-12 19:53:41,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:41,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:41,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:41,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:41,724 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) [2021-06-12 19:53:42,152 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 86 [2021-06-12 19:53:42,428 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2021-06-12 19:53:42,701 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 114 [2021-06-12 19:53:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:42,781 INFO L93 Difference]: Finished difference Result 285 states and 823 transitions. [2021-06-12 19:53:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:53:42,782 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 [2021-06-12 19:53:42,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:42,782 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:53:42,782 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 19:53:42,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1277.5ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 19:53:42,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 194. [2021-06-12 19:53:42,786 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) [2021-06-12 19:53:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-12 19:53:42,786 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-12 19:53:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:42,787 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-12 19:53:42,787 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) [2021-06-12 19:53:42,787 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-12 19:53:42,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:42,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:42,787 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:42,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2149,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:42,993 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash 947967822, now seen corresponding path program 47 times [2021-06-12 19:53:42,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:42,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686657081] [2021-06-12 19:53:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:43,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686657081] [2021-06-12 19:53:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686657081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:43,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590127025] [2021-06-12 19:53:43,292 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 [2021-06-12 19:53:43,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:43,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:43,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:53:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:43,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,411 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 15 treesize of output 11 [2021-06-12 19:53:43,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:43,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,415 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 25 treesize of output 19 [2021-06-12 19:53:43,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:43,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,419 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 25 treesize of output 19 [2021-06-12 19:53:43,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:43,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,423 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 35 treesize of output 27 [2021-06-12 19:53:43,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:43,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:43,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:53:43,504 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:209, output treesize:269 [2021-06-12 19:53:43,860 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-06-12 19:53:44,232 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]} [2021-06-12 19:53:44,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:44,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:44,496 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 180 [2021-06-12 19:53:44,497 INFO L628 ElimStorePlain]: treesize reduction 328, result has 57.4 percent of original size [2021-06-12 19:53:44,504 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 7 treesize of output 5 [2021-06-12 19:53:44,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:44,614 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-12 19:53:44,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:44,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:44,731 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-12 19:53:44,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:44,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:44,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:44,980 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 174 [2021-06-12 19:53:44,981 INFO L628 ElimStorePlain]: treesize reduction 11, result has 97.6 percent of original size [2021-06-12 19:53:44,988 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 48 treesize of output 38 [2021-06-12 19:53:44,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,107 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 19:53:45,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:45,114 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 [2021-06-12 19:53:45,115 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:45,233 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 19:53:45,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:45,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-06-12 19:53:45,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_587 vanished before elimination [2021-06-12 19:53:45,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-06-12 19:53:45,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_622 vanished before elimination [2021-06-12 19:53:45,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:45,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:45,364 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-12 19:53:45,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:45,364 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-06-12 19:53:45,371 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 27 treesize of output 21 [2021-06-12 19:53:45,372 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:45,499 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-12 19:53:45,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:45,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_615 vanished before elimination [2021-06-12 19:53:45,505 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 28 treesize of output 22 [2021-06-12 19:53:45,506 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,632 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2021-06-12 19:53:45,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:45,639 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 7 treesize of output 5 [2021-06-12 19:53:45,640 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,767 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-12 19:53:45,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:45,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:45,778 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,016 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 154 [2021-06-12 19:53:46,017 INFO L628 ElimStorePlain]: treesize reduction 5, result has 98.9 percent of original size [2021-06-12 19:53:46,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-12 19:53:46,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,023 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 [2021-06-12 19:53:46,024 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,142 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-12 19:53:46,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,149 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 44 treesize of output 19 [2021-06-12 19:53:46,149 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,267 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2021-06-12 19:53:46,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,275 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 [2021-06-12 19:53:46,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,282 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 46 treesize of output 15 [2021-06-12 19:53:46,282 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,414 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2021-06-12 19:53:46,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,421 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 [2021-06-12 19:53:46,422 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,427 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 11 treesize of output 3 [2021-06-12 19:53:46,428 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,551 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-12 19:53:46,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_595 vanished before elimination [2021-06-12 19:53:46,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-12 19:53:46,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_598 vanished before elimination [2021-06-12 19:53:46,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_621 vanished before elimination [2021-06-12 19:53:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,558 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 10 treesize of output 5 [2021-06-12 19:53:46,558 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,564 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 20 treesize of output 9 [2021-06-12 19:53:46,564 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,683 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-06-12 19:53:46,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,690 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 44 treesize of output 19 [2021-06-12 19:53:46,691 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,697 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 12 treesize of output 5 [2021-06-12 19:53:46,697 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,814 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 19:53:46,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,814 INFO L518 ElimStorePlain]: Eliminatee v_prenex_611 vanished before elimination [2021-06-12 19:53:46,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,821 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 11 treesize of output 3 [2021-06-12 19:53:46,821 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,826 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 21 treesize of output 7 [2021-06-12 19:53:46,827 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:46,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-06-12 19:53:46,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_614 vanished before elimination [2021-06-12 19:53:46,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,935 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 21 treesize of output 7 [2021-06-12 19:53:46,935 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:47,036 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-06-12 19:53:47,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:47,036 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-06-12 19:53:47,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,041 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 12 treesize of output 5 [2021-06-12 19:53:47,042 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:47,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:47,135 INFO L518 ElimStorePlain]: Eliminatee v_prenex_608 vanished before elimination [2021-06-12 19:53:47,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 18 dim-0 vars, 36 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 19:53:47,141 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 54 variables, input treesize:736, output treesize:170 [2021-06-12 19:53:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:47,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590127025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:47,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:47,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:53:47,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461733901] [2021-06-12 19:53:47,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:47,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:47,236 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) [2021-06-12 19:53:47,760 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2021-06-12 19:53:48,159 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 152 [2021-06-12 19:53:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:48,266 INFO L93 Difference]: Finished difference Result 227 states and 667 transitions. [2021-06-12 19:53:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:48,266 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 [2021-06-12 19:53:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:48,266 INFO L225 Difference]: With dead ends: 227 [2021-06-12 19:53:48,267 INFO L226 Difference]: Without dead ends: 223 [2021-06-12 19:53:48,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1417.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:53:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-06-12 19:53:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 196. [2021-06-12 19:53:48,269 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) [2021-06-12 19:53:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 580 transitions. [2021-06-12 19:53:48,269 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 580 transitions. Word has length 17 [2021-06-12 19:53:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:48,270 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 580 transitions. [2021-06-12 19:53:48,270 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) [2021-06-12 19:53:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 580 transitions. [2021-06-12 19:53:48,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:48,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:48,270 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:48,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2185,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:48,485 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:48,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1290551334, now seen corresponding path program 48 times [2021-06-12 19:53:48,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:48,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925496957] [2021-06-12 19:53:48,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:48,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925496957] [2021-06-12 19:53:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925496957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636870815] [2021-06-12 19:53:48,661 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 [2021-06-12 19:53:48,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:48,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:48,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:48,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,826 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 [2021-06-12 19:53:48,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,831 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 25 treesize of output 19 [2021-06-12 19:53:48,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,835 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 17 treesize of output 13 [2021-06-12 19:53:48,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,840 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 27 treesize of output 21 [2021-06-12 19:53:48,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:48,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:48,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:53:48,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:53:49,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,216 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 29 treesize of output 23 [2021-06-12 19:53:49,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:49,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,224 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 19 treesize of output 15 [2021-06-12 19:53:49,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,232 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 38 treesize of output 30 [2021-06-12 19:53:49,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:49,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,239 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 28 treesize of output 22 [2021-06-12 19:53:49,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,522 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2021-06-12 19:53:49,523 INFO L628 ElimStorePlain]: treesize reduction 98, result has 78.6 percent of original size [2021-06-12 19:53:49,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,527 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 27 treesize of output 21 [2021-06-12 19:53:49,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:49,643 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 19:53:49,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:49,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,649 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 [2021-06-12 19:53:49,649 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,654 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 [2021-06-12 19:53:49,654 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:49,770 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 19:53:49,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:49,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:49,776 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,884 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 19:53:49,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:49,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,889 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 27 treesize of output 21 [2021-06-12 19:53:49,890 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:49,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:49,898 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,008 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 19:53:50,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:50,009 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:50,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,014 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 20 treesize of output 9 [2021-06-12 19:53:50,014 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,019 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 [2021-06-12 19:53:50,020 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:50,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,032 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 9 treesize of output 3 [2021-06-12 19:53:50,032 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,136 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-06-12 19:53:50,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:50,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,141 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 [2021-06-12 19:53:50,142 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,146 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 [2021-06-12 19:53:50,147 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,151 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 24 treesize of output 9 [2021-06-12 19:53:50,152 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,160 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 [2021-06-12 19:53:50,161 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:50,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,173 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 44 treesize of output 19 [2021-06-12 19:53:50,174 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,177 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 23 treesize of output 11 [2021-06-12 19:53:50,178 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:50,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:50,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:53:50,289 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:424, output treesize:176 [2021-06-12 19:53:50,424 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-12 19:53:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:50,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636870815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:50,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:50,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:53:50,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669990777] [2021-06-12 19:53:50,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:50,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:50,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:50,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:50,492 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) [2021-06-12 19:53:50,879 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-12 19:53:51,025 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-06-12 19:53:51,202 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 19:53:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:51,232 INFO L93 Difference]: Finished difference Result 233 states and 675 transitions. [2021-06-12 19:53:51,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:51,232 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 [2021-06-12 19:53:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:51,232 INFO L225 Difference]: With dead ends: 233 [2021-06-12 19:53:51,232 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:53:51,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 989.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:51,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:53:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-06-12 19:53:51,235 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) [2021-06-12 19:53:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-12 19:53:51,235 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-12 19:53:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:51,235 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-12 19:53:51,235 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) [2021-06-12 19:53:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-12 19:53:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:51,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:51,236 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:51,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-12 19:53:51,436 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2132806164, now seen corresponding path program 49 times [2021-06-12 19:53:51,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:51,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064061998] [2021-06-12 19:53:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:51,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:51,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064061998] [2021-06-12 19:53:51,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064061998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:51,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099032049] [2021-06-12 19:53:51,686 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 [2021-06-12 19:53:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:51,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:51,768 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 15 treesize of output 11 [2021-06-12 19:53:51,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:51,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:51,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:51,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,776 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 [2021-06-12 19:53:51,776 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:51,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:53:51,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:77 [2021-06-12 19:53:51,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,883 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 27 treesize of output 21 [2021-06-12 19:53:51,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:51,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,889 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 [2021-06-12 19:53:51,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,895 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 [2021-06-12 19:53:51,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:51,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:51,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,908 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 37 treesize of output 29 [2021-06-12 19:53:51,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:51,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:51,916 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,920 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 [2021-06-12 19:53:51,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,927 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 18 treesize of output 14 [2021-06-12 19:53:51,928 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,933 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 [2021-06-12 19:53:51,934 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,938 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 27 treesize of output 21 [2021-06-12 19:53:51,938 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,093 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 19:53:52,094 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-12 19:53:52,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,097 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 10 treesize of output 5 [2021-06-12 19:53:52,098 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,101 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 20 treesize of output 9 [2021-06-12 19:53:52,101 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,104 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 [2021-06-12 19:53:52,105 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,108 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 11 treesize of output 3 [2021-06-12 19:53:52,108 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:52,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,118 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 12 treesize of output 5 [2021-06-12 19:53:52,119 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,122 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 44 treesize of output 19 [2021-06-12 19:53:52,122 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,125 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 12 treesize of output 5 [2021-06-12 19:53:52,126 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:52,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,138 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 [2021-06-12 19:53:52,138 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,141 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 [2021-06-12 19:53:52,141 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:52,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:52,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:53:52,207 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:53:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:52,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099032049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:52,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:53:52,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616955261] [2021-06-12 19:53:52,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:52,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:52,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:52,332 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) [2021-06-12 19:53:53,079 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 84 [2021-06-12 19:53:53,450 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2021-06-12 19:53:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:53,491 INFO L93 Difference]: Finished difference Result 312 states and 879 transitions. [2021-06-12 19:53:53,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:53,492 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 [2021-06-12 19:53:53,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:53,492 INFO L225 Difference]: With dead ends: 312 [2021-06-12 19:53:53,492 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:53:53,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1267.4ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:53:53,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 199. [2021-06-12 19:53:53,495 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) [2021-06-12 19:53:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-06-12 19:53:53,495 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-06-12 19:53:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:53,495 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-06-12 19:53:53,495 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) [2021-06-12 19:53:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-06-12 19:53:53,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:53,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:53,496 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:53,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2293 [2021-06-12 19:53:53,696 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:53,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash 213094778, now seen corresponding path program 50 times [2021-06-12 19:53:53,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:53,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468693550] [2021-06-12 19:53:53,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:53,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468693550] [2021-06-12 19:53:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468693550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194732264] [2021-06-12 19:53:53,928 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 [2021-06-12 19:53:53,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:53,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:54,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,214 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 35 treesize of output 27 [2021-06-12 19:53:54,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,220 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 25 treesize of output 19 [2021-06-12 19:53:54,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,225 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 25 treesize of output 19 [2021-06-12 19:53:54,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:54,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,320 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 15 treesize of output 11 [2021-06-12 19:53:54,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,325 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 [2021-06-12 19:53:54,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,330 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 [2021-06-12 19:53:54,331 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:54,436 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. [2021-06-12 19:53:54,436 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:258, output treesize:300 [2021-06-12 19:53:54,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,880 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 [2021-06-12 19:53:54,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:54,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,886 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 [2021-06-12 19:53:54,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,148 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 94 [2021-06-12 19:53:55,148 INFO L628 ElimStorePlain]: treesize reduction 234, result has 63.1 percent of original size [2021-06-12 19:53:55,153 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 7 treesize of output 5 [2021-06-12 19:53:55,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,263 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 19:53:55,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,263 INFO L518 ElimStorePlain]: Eliminatee v_prenex_648 vanished before elimination [2021-06-12 19:53:55,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,269 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 [2021-06-12 19:53:55,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,275 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 29 treesize of output 23 [2021-06-12 19:53:55,276 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:55,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:53:55,287 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:55,292 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,297 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 27 treesize of output 21 [2021-06-12 19:53:55,297 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,464 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2021-06-12 19:53:55,465 INFO L628 ElimStorePlain]: treesize reduction 22, result has 93.1 percent of original size [2021-06-12 19:53:55,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,473 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 27 treesize of output 21 [2021-06-12 19:53:55,474 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:55,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,565 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 46 treesize of output 15 [2021-06-12 19:53:55,565 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,570 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 12 treesize of output 5 [2021-06-12 19:53:55,571 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,576 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 10 treesize of output 5 [2021-06-12 19:53:55,576 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,581 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 20 treesize of output 9 [2021-06-12 19:53:55,581 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,586 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 12 treesize of output 5 [2021-06-12 19:53:55,586 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,673 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 [2021-06-12 19:53:55,673 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,677 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 21 treesize of output 7 [2021-06-12 19:53:55,678 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,769 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 [2021-06-12 19:53:55,770 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,773 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 11 treesize of output 3 [2021-06-12 19:53:55,774 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:55,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 19:53:55,861 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 16 variables, input treesize:631, output treesize:83 [2021-06-12 19:53:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:55,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194732264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:55,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:55,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:53:55,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300865102] [2021-06-12 19:53:55,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:53:55,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:55,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:53:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:53:55,909 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) [2021-06-12 19:53:56,383 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-12 19:53:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:56,574 INFO L93 Difference]: Finished difference Result 232 states and 673 transitions. [2021-06-12 19:53:56,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:56,575 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 [2021-06-12 19:53:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:56,575 INFO L225 Difference]: With dead ends: 232 [2021-06-12 19:53:56,575 INFO L226 Difference]: Without dead ends: 228 [2021-06-12 19:53:56,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 967.6ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-06-12 19:53:56,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2021-06-12 19:53:56,577 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) [2021-06-12 19:53:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 594 transitions. [2021-06-12 19:53:56,578 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 594 transitions. Word has length 17 [2021-06-12 19:53:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:56,578 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 594 transitions. [2021-06-12 19:53:56,578 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) [2021-06-12 19:53:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 594 transitions. [2021-06-12 19:53:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:56,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:56,578 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:56,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2309,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:56,779 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:56,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1694332648, now seen corresponding path program 51 times [2021-06-12 19:53:56,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:56,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118660661] [2021-06-12 19:53:56,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:56,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:56,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:56,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118660661] [2021-06-12 19:53:56,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118660661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:56,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891965036] [2021-06-12 19:53:56,930 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 [2021-06-12 19:53:56,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:53:56,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:57,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:57,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,068 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 19 treesize of output 15 [2021-06-12 19:53:57,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,071 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 31 treesize of output 25 [2021-06-12 19:53:57,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:57,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:57,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:57,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,080 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 17 treesize of output 13 [2021-06-12 19:53:57,081 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,136 INFO L628 ElimStorePlain]: treesize reduction 20, result has 86.2 percent of original size [2021-06-12 19:53:57,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:53:57,138 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:167, output treesize:125 [2021-06-12 19:53:57,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:57,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:57,286 INFO L628 ElimStorePlain]: treesize reduction 46, result has 74.2 percent of original size [2021-06-12 19:53:57,287 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:53:57,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:53:57,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,327 INFO L628 ElimStorePlain]: treesize reduction 33, result has 71.6 percent of original size [2021-06-12 19:53:57,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_652 vanished before elimination [2021-06-12 19:53:57,329 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 21 treesize of output 17 [2021-06-12 19:53:57,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,332 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 19 treesize of output 15 [2021-06-12 19:53:57,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,334 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 28 treesize of output 22 [2021-06-12 19:53:57,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,354 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:53:57,354 INFO L518 ElimStorePlain]: Eliminatee v_prenex_654 vanished before elimination [2021-06-12 19:53:57,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:53:57,355 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-12 19:53:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891965036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:57,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:53:57,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695658538] [2021-06-12 19:53:57,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:53:57,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:57,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:53:57,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:53:57,387 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) [2021-06-12 19:53:57,883 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2021-06-12 19:53:57,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:57,921 INFO L93 Difference]: Finished difference Result 231 states and 671 transitions. [2021-06-12 19:53:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:53:57,922 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 [2021-06-12 19:53:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:57,922 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:53:57,922 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:53:57,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:53:57,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 196. [2021-06-12 19:53:57,925 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) [2021-06-12 19:53:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 582 transitions. [2021-06-12 19:53:57,925 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 582 transitions. Word has length 17 [2021-06-12 19:53:57,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:57,925 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 582 transitions. [2021-06-12 19:53:57,925 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) [2021-06-12 19:53:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 582 transitions. [2021-06-12 19:53:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:57,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:57,926 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:58,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2357 [2021-06-12 19:53:58,126 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash -812726634, now seen corresponding path program 52 times [2021-06-12 19:53:58,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:58,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031321596] [2021-06-12 19:53:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:58,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:58,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031321596] [2021-06-12 19:53:58,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031321596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:58,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108165702] [2021-06-12 19:53:58,358 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 [2021-06-12 19:53:58,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:58,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:53:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:58,468 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 [2021-06-12 19:53:58,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,471 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 27 treesize of output 21 [2021-06-12 19:53:58,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:58,475 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 15 treesize of output 11 [2021-06-12 19:53:58,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,478 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 [2021-06-12 19:53:58,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:58,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:53:58,506 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:53:58,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,607 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 25 treesize of output 19 [2021-06-12 19:53:58,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,613 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 27 treesize of output 21 [2021-06-12 19:53:58,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,619 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 28 treesize of output 22 [2021-06-12 19:53:58,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:58,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,625 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 15 treesize of output 11 [2021-06-12 19:53:58,626 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,629 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 [2021-06-12 19:53:58,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:53:58,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,634 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 37 treesize of output 29 [2021-06-12 19:53:58,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:53:58,639 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:58,639 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,643 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 18 treesize of output 14 [2021-06-12 19:53:58,643 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,647 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 25 treesize of output 19 [2021-06-12 19:53:58,648 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,656 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 27 treesize of output 21 [2021-06-12 19:53:58,657 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,800 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 19:53:58,800 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-12 19:53:58,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,804 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 10 treesize of output 5 [2021-06-12 19:53:58,804 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,808 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 20 treesize of output 9 [2021-06-12 19:53:58,809 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,812 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 21 treesize of output 7 [2021-06-12 19:53:58,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,815 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 11 treesize of output 3 [2021-06-12 19:53:58,816 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:58,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,826 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 12 treesize of output 5 [2021-06-12 19:53:58,826 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,829 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 44 treesize of output 19 [2021-06-12 19:53:58,830 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,833 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 12 treesize of output 5 [2021-06-12 19:53:58,833 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:58,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,845 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 [2021-06-12 19:53:58,845 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,848 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 [2021-06-12 19:53:58,848 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:58,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:58,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:53:58,913 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:53:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108165702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:59,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 19:53:59,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695196195] [2021-06-12 19:53:59,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:59,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:59,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:59,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:59,043 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) [2021-06-12 19:53:59,717 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-12 19:53:59,900 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-12 19:53:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:59,958 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2021-06-12 19:53:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:53:59,958 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 [2021-06-12 19:53:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:59,959 INFO L225 Difference]: With dead ends: 267 [2021-06-12 19:53:59,959 INFO L226 Difference]: Without dead ends: 263 [2021-06-12 19:53:59,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 979.6ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-12 19:53:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 199. [2021-06-12 19:53:59,961 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) [2021-06-12 19:53:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-12 19:53:59,962 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-12 19:53:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:59,962 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-12 19:53:59,962 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) [2021-06-12 19:53:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-12 19:53:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:59,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:59,962 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:00,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2380 [2021-06-12 19:54:00,163 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash 668511236, now seen corresponding path program 53 times [2021-06-12 19:54:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:00,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375412545] [2021-06-12 19:54:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:00,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:00,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375412545] [2021-06-12 19:54:00,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375412545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:00,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144614688] [2021-06-12 19:54:00,497 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 [2021-06-12 19:54:00,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:00,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:00,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:00,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:00,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,615 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 35 treesize of output 27 [2021-06-12 19:54:00,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,619 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 25 treesize of output 19 [2021-06-12 19:54:00,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,623 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 [2021-06-12 19:54:00,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,626 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 25 treesize of output 19 [2021-06-12 19:54:00,627 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:00,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:00,679 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:211 [2021-06-12 19:54:00,781 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]} [2021-06-12 19:54:00,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:00,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,790 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 27 treesize of output 21 [2021-06-12 19:54:00,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:00,983 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2021-06-12 19:54:00,983 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.6 percent of original size [2021-06-12 19:54:00,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:00,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,991 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 30 treesize of output 24 [2021-06-12 19:54:00,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:00,996 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:01,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:01,006 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:01,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,142 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 19:54:01,143 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.2 percent of original size [2021-06-12 19:54:01,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:01,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,212 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 27 treesize of output 21 [2021-06-12 19:54:01,213 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:01,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,283 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 21 treesize of output 7 [2021-06-12 19:54:01,283 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,286 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 11 treesize of output 3 [2021-06-12 19:54:01,287 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,358 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:54:01,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,361 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 44 treesize of output 19 [2021-06-12 19:54:01,362 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,365 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 [2021-06-12 19:54:01,366 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,369 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 [2021-06-12 19:54:01,370 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,373 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 [2021-06-12 19:54:01,374 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,376 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 12 treesize of output 5 [2021-06-12 19:54:01,377 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,439 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 10 treesize of output 5 [2021-06-12 19:54:01,440 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,442 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 20 treesize of output 9 [2021-06-12 19:54:01,443 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:01,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:01,510 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:54:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:01,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144614688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:01,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:01,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 19:54:01,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698259749] [2021-06-12 19:54:01,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:01,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:01,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:01,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:01,651 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) [2021-06-12 19:54:02,253 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-06-12 19:54:02,551 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2021-06-12 19:54:02,804 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-06-12 19:54:02,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:02,878 INFO L93 Difference]: Finished difference Result 255 states and 741 transitions. [2021-06-12 19:54:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:02,878 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 [2021-06-12 19:54:02,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:02,879 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:54:02,879 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 19:54:02,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1490.6ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:54:02,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 19:54:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 194. [2021-06-12 19:54:02,881 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) [2021-06-12 19:54:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-12 19:54:02,882 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-12 19:54:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:02,882 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-12 19:54:02,882 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) [2021-06-12 19:54:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-12 19:54:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:02,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:02,882 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:03,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2398 [2021-06-12 19:54:03,083 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 672434372, now seen corresponding path program 54 times [2021-06-12 19:54:03,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:03,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121533269] [2021-06-12 19:54:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:03,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:03,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121533269] [2021-06-12 19:54:03,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121533269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:03,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953300685] [2021-06-12 19:54:03,343 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 [2021-06-12 19:54:03,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:03,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,490 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 15 treesize of output 11 [2021-06-12 19:54:03,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,495 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 25 treesize of output 19 [2021-06-12 19:54:03,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,500 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 35 treesize of output 27 [2021-06-12 19:54:03,501 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:03,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,505 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 25 treesize of output 19 [2021-06-12 19:54:03,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:03,592 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. [2021-06-12 19:54:03,592 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:187, output treesize:243 [2021-06-12 19:54:04,017 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]} [2021-06-12 19:54:04,022 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 17 treesize of output 13 [2021-06-12 19:54:04,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,026 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 15 treesize of output 11 [2021-06-12 19:54:04,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,134 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-12 19:54:04,134 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.7 percent of original size [2021-06-12 19:54:04,138 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 27 treesize of output 21 [2021-06-12 19:54:04,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:04,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:04,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:04,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:04,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:04,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,288 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 29 treesize of output 23 [2021-06-12 19:54:04,289 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_669 vanished before elimination [2021-06-12 19:54:04,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,337 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 21 treesize of output 7 [2021-06-12 19:54:04,338 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,341 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 11 treesize of output 3 [2021-06-12 19:54:04,342 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,400 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 24 treesize of output 9 [2021-06-12 19:54:04,401 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,404 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 20 treesize of output 9 [2021-06-12 19:54:04,405 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,450 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 21 treesize of output 7 [2021-06-12 19:54:04,451 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,454 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 11 treesize of output 3 [2021-06-12 19:54:04,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,505 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 12 treesize of output 5 [2021-06-12 19:54:04,506 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:04,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:04,549 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-06-12 19:54:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:04,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953300685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:04,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:54:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557739287] [2021-06-12 19:54:04,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:04,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:04,600 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) [2021-06-12 19:54:05,001 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2021-06-12 19:54:05,333 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 110 [2021-06-12 19:54:05,601 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 102 [2021-06-12 19:54:06,021 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 135 [2021-06-12 19:54:06,383 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 127 [2021-06-12 19:54:06,644 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 93 [2021-06-12 19:54:07,023 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 118 [2021-06-12 19:54:07,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:07,146 INFO L93 Difference]: Finished difference Result 272 states and 787 transitions. [2021-06-12 19:54:07,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:07,146 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 [2021-06-12 19:54:07,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:07,147 INFO L225 Difference]: With dead ends: 272 [2021-06-12 19:54:07,147 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 19:54:07,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2620.7ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:54:07,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 19:54:07,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 198. [2021-06-12 19:54:07,149 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) [2021-06-12 19:54:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-06-12 19:54:07,149 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-06-12 19:54:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:07,149 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-06-12 19:54:07,150 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) [2021-06-12 19:54:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-06-12 19:54:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:07,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:07,150 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:07,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:07,351 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1633532686, now seen corresponding path program 55 times [2021-06-12 19:54:07,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:07,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234826788] [2021-06-12 19:54:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234826788] [2021-06-12 19:54:07,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234826788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500693779] [2021-06-12 19:54:07,552 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 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 [2021-06-12 19:54:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:07,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:07,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:07,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,801 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 [2021-06-12 19:54:07,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,807 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 35 treesize of output 27 [2021-06-12 19:54:07,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:07,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,814 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 15 treesize of output 11 [2021-06-12 19:54:07,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,820 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 [2021-06-12 19:54:07,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:07,901 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. [2021-06-12 19:54:07,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:191, output treesize:247 [2021-06-12 19:54:08,274 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]} [2021-06-12 19:54:08,279 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 17 treesize of output 13 [2021-06-12 19:54:08,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,283 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 15 treesize of output 11 [2021-06-12 19:54:08,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,354 INFO L628 ElimStorePlain]: treesize reduction 141, result has 43.6 percent of original size [2021-06-12 19:54:08,357 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 29 treesize of output 23 [2021-06-12 19:54:08,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,383 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 19 treesize of output 15 [2021-06-12 19:54:08,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,407 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 27 treesize of output 21 [2021-06-12 19:54:08,408 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:08,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,433 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:54:08,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,436 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 12 treesize of output 5 [2021-06-12 19:54:08,436 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,463 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 [2021-06-12 19:54:08,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,491 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 21 treesize of output 7 [2021-06-12 19:54:08,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,494 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 11 treesize of output 3 [2021-06-12 19:54:08,494 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:08,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:54:08,525 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:264, output treesize:38 [2021-06-12 19:54:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:08,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500693779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:08,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:08,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:54:08,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5092794] [2021-06-12 19:54:08,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:08,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:08,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:08,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:08,555 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) [2021-06-12 19:54:09,054 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 94 [2021-06-12 19:54:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:09,120 INFO L93 Difference]: Finished difference Result 230 states and 670 transitions. [2021-06-12 19:54:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:54:09,121 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 [2021-06-12 19:54:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:09,121 INFO L225 Difference]: With dead ends: 230 [2021-06-12 19:54:09,121 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:54:09,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:09,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:54:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 202. [2021-06-12 19:54:09,124 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) [2021-06-12 19:54:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 600 transitions. [2021-06-12 19:54:09,124 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 600 transitions. Word has length 17 [2021-06-12 19:54:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:09,124 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 600 transitions. [2021-06-12 19:54:09,124 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) [2021-06-12 19:54:09,125 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 600 transitions. [2021-06-12 19:54:09,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:09,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:09,125 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:09,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2444 [2021-06-12 19:54:09,326 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1386912514, now seen corresponding path program 56 times [2021-06-12 19:54:09,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:09,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286171715] [2021-06-12 19:54:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:09,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:09,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286171715] [2021-06-12 19:54:09,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286171715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:09,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014825330] [2021-06-12 19:54:09,528 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 [2021-06-12 19:54:09,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:09,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:09,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:09,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:09,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,710 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 15 treesize of output 11 [2021-06-12 19:54:09,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,714 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 35 treesize of output 27 [2021-06-12 19:54:09,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:09,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,720 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 [2021-06-12 19:54:09,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,724 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 [2021-06-12 19:54:09,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:09,801 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. [2021-06-12 19:54:09,801 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:235 [2021-06-12 19:54:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,964 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 29 treesize of output 23 [2021-06-12 19:54:09,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,970 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 27 treesize of output 21 [2021-06-12 19:54:09,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,976 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 29 treesize of output 23 [2021-06-12 19:54:09,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:09,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:09,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,993 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 45 treesize of output 35 [2021-06-12 19:54:09,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,999 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 27 treesize of output 21 [2021-06-12 19:54:09,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,004 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 47 treesize of output 37 [2021-06-12 19:54:10,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,205 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2021-06-12 19:54:10,206 INFO L628 ElimStorePlain]: treesize reduction 206, result has 58.2 percent of original size [2021-06-12 19:54:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,211 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 20 treesize of output 9 [2021-06-12 19:54:10,212 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,222 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 12 treesize of output 5 [2021-06-12 19:54:10,222 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,227 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 46 treesize of output 15 [2021-06-12 19:54:10,228 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,232 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 [2021-06-12 19:54:10,233 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,237 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 [2021-06-12 19:54:10,238 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,317 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 27 treesize of output 21 [2021-06-12 19:54:10,319 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:10,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,403 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 11 treesize of output 3 [2021-06-12 19:54:10,404 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,408 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 [2021-06-12 19:54:10,409 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,496 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 27 treesize of output 21 [2021-06-12 19:54:10,497 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:10,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,580 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 11 treesize of output 3 [2021-06-12 19:54:10,581 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,584 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 21 treesize of output 7 [2021-06-12 19:54:10,585 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:10,674 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:10,749 INFO L518 ElimStorePlain]: Eliminatee v_prenex_697 vanished before elimination [2021-06-12 19:54:10,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:10,752 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 12 variables, input treesize:613, output treesize:135 [2021-06-12 19:54:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014825330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:10,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315403178] [2021-06-12 19:54:10,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:10,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:10,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:10,889 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) [2021-06-12 19:54:11,589 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-12 19:54:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:11,661 INFO L93 Difference]: Finished difference Result 241 states and 703 transitions. [2021-06-12 19:54:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:11,661 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 [2021-06-12 19:54:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:11,662 INFO L225 Difference]: With dead ends: 241 [2021-06-12 19:54:11,662 INFO L226 Difference]: Without dead ends: 237 [2021-06-12 19:54:11,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 880.4ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-12 19:54:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 200. [2021-06-12 19:54:11,664 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) [2021-06-12 19:54:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 592 transitions. [2021-06-12 19:54:11,665 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 592 transitions. Word has length 17 [2021-06-12 19:54:11,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:11,665 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 592 transitions. [2021-06-12 19:54:11,665 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) [2021-06-12 19:54:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 592 transitions. [2021-06-12 19:54:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:11,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:11,666 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:11,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2473,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:11,889 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1560160206, now seen corresponding path program 57 times [2021-06-12 19:54:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335771861] [2021-06-12 19:54:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:12,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:12,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335771861] [2021-06-12 19:54:12,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335771861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:12,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900085764] [2021-06-12 19:54:12,089 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 [2021-06-12 19:54:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:54:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:12,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,366 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 27 treesize of output 21 [2021-06-12 19:54:12,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:12,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,372 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 25 treesize of output 19 [2021-06-12 19:54:12,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,424 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 25 treesize of output 19 [2021-06-12 19:54:12,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,428 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 15 treesize of output 11 [2021-06-12 19:54:12,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,467 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. [2021-06-12 19:54:12,467 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:134, output treesize:124 [2021-06-12 19:54:12,604 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]} [2021-06-12 19:54:12,609 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 25 treesize of output 19 [2021-06-12 19:54:12,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,714 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2021-06-12 19:54:12,715 INFO L628 ElimStorePlain]: treesize reduction 152, result has 46.9 percent of original size [2021-06-12 19:54:12,719 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 19 treesize of output 15 [2021-06-12 19:54:12,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,724 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 28 treesize of output 22 [2021-06-12 19:54:12,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,765 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 27 treesize of output 21 [2021-06-12 19:54:12,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:12,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:12,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:12,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,838 INFO L518 ElimStorePlain]: Eliminatee v_prenex_704 vanished before elimination [2021-06-12 19:54:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,842 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 21 treesize of output 7 [2021-06-12 19:54:12,842 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,845 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 11 treesize of output 3 [2021-06-12 19:54:12,846 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,884 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 20 treesize of output 9 [2021-06-12 19:54:12,885 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,888 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 10 treesize of output 5 [2021-06-12 19:54:12,888 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,932 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 [2021-06-12 19:54:12,932 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,935 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 21 treesize of output 7 [2021-06-12 19:54:12,935 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:12,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:12,976 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 12 variables, input treesize:293, output treesize:52 [2021-06-12 19:54:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:13,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900085764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:13,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:13,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:13,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697759549] [2021-06-12 19:54:13,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:13,025 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) [2021-06-12 19:54:13,631 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-06-12 19:54:13,802 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-12 19:54:14,035 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 100 [2021-06-12 19:54:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:14,148 INFO L93 Difference]: Finished difference Result 231 states and 678 transitions. [2021-06-12 19:54:14,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:14,149 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 [2021-06-12 19:54:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:14,149 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:54:14,149 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:54:14,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1175.3ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:54:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 194. [2021-06-12 19:54:14,152 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) [2021-06-12 19:54:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-12 19:54:14,152 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-12 19:54:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:14,152 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-12 19:54:14,152 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) [2021-06-12 19:54:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-12 19:54:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:14,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:14,152 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:14,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2509,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:14,353 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:14,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1698524914, now seen corresponding path program 58 times [2021-06-12 19:54:14,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:14,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948585544] [2021-06-12 19:54:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:14,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:14,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948585544] [2021-06-12 19:54:14,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948585544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:14,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481042576] [2021-06-12 19:54:14,527 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 [2021-06-12 19:54:14,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:14,639 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 25 treesize of output 19 [2021-06-12 19:54:14,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,644 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 27 treesize of output 21 [2021-06-12 19:54:14,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:14,648 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 15 treesize of output 11 [2021-06-12 19:54:14,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:14,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:14,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:14,689 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:54:14,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,766 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 [2021-06-12 19:54:14,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,770 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 27 treesize of output 21 [2021-06-12 19:54:14,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:14,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,774 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 [2021-06-12 19:54:14,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:14,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,779 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 15 treesize of output 11 [2021-06-12 19:54:14,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,783 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 35 treesize of output 27 [2021-06-12 19:54:14,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,787 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 37 treesize of output 29 [2021-06-12 19:54:14,788 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:14,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:14,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,796 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 18 treesize of output 14 [2021-06-12 19:54:14,796 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,800 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 25 treesize of output 19 [2021-06-12 19:54:14,800 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,803 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 27 treesize of output 21 [2021-06-12 19:54:14,804 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,951 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 19:54:14,951 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-12 19:54:14,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,955 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 10 treesize of output 5 [2021-06-12 19:54:14,955 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:54:14,959 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,962 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 21 treesize of output 7 [2021-06-12 19:54:14,962 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,965 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 11 treesize of output 3 [2021-06-12 19:54:14,966 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:14,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,976 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 12 treesize of output 5 [2021-06-12 19:54:14,976 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,979 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 44 treesize of output 19 [2021-06-12 19:54:14,980 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,982 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 12 treesize of output 5 [2021-06-12 19:54:14,983 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:14,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,994 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 [2021-06-12 19:54:14,995 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,997 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 11 treesize of output 3 [2021-06-12 19:54:14,998 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:15,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:15,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:15,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:15,063 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:54:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:15,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481042576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:15,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:15,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:54:15,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118423710] [2021-06-12 19:54:15,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:15,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:15,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:15,190 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) [2021-06-12 19:54:15,709 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:54:15,886 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:54:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:15,929 INFO L93 Difference]: Finished difference Result 225 states and 659 transitions. [2021-06-12 19:54:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:15,930 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 [2021-06-12 19:54:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:15,930 INFO L225 Difference]: With dead ends: 225 [2021-06-12 19:54:15,930 INFO L226 Difference]: Without dead ends: 221 [2021-06-12 19:54:15,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-12 19:54:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2021-06-12 19:54:15,933 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) [2021-06-12 19:54:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-06-12 19:54:15,933 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-06-12 19:54:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:15,933 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-06-12 19:54:15,933 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) [2021-06-12 19:54:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-06-12 19:54:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:15,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:15,934 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:16,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2553 [2021-06-12 19:54:16,149 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash -217287044, now seen corresponding path program 59 times [2021-06-12 19:54:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:16,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696912008] [2021-06-12 19:54:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:16,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696912008] [2021-06-12 19:54:16,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696912008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496254547] [2021-06-12 19:54:16,430 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 [2021-06-12 19:54:16,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:16,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,672 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 15 treesize of output 11 [2021-06-12 19:54:16,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:16,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,678 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 [2021-06-12 19:54:16,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:16,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,683 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 25 treesize of output 19 [2021-06-12 19:54:16,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:16,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,688 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 35 treesize of output 27 [2021-06-12 19:54:16,690 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:16,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:16,791 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. [2021-06-12 19:54:16,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:191, output treesize:251 [2021-06-12 19:54:17,012 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-06-12 19:54:17,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,018 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 30 treesize of output 24 [2021-06-12 19:54:17,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,024 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 28 treesize of output 22 [2021-06-12 19:54:17,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:17,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,036 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 17 treesize of output 13 [2021-06-12 19:54:17,037 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,042 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 [2021-06-12 19:54:17,043 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:17,048 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,054 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 27 treesize of output 21 [2021-06-12 19:54:17,055 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,061 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 46 treesize of output 36 [2021-06-12 19:54:17,061 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,067 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 27 treesize of output 21 [2021-06-12 19:54:17,068 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:17,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,074 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 15 treesize of output 11 [2021-06-12 19:54:17,075 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,081 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 30 treesize of output 24 [2021-06-12 19:54:17,083 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,089 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 28 treesize of output 22 [2021-06-12 19:54:17,090 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,096 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 48 treesize of output 38 [2021-06-12 19:54:17,097 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,102 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 25 treesize of output 19 [2021-06-12 19:54:17,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,338 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2021-06-12 19:54:17,339 INFO L628 ElimStorePlain]: treesize reduction 203, result has 61.9 percent of original size [2021-06-12 19:54:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,344 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 12 treesize of output 5 [2021-06-12 19:54:17,344 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,349 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 21 treesize of output 7 [2021-06-12 19:54:17,350 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,355 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 21 treesize of output 7 [2021-06-12 19:54:17,356 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,361 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 10 treesize of output 5 [2021-06-12 19:54:17,362 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,367 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 20 treesize of output 9 [2021-06-12 19:54:17,368 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,380 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 11 treesize of output 3 [2021-06-12 19:54:17,381 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,385 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 21 treesize of output 7 [2021-06-12 19:54:17,386 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,399 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 12 treesize of output 5 [2021-06-12 19:54:17,399 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,403 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 44 treesize of output 19 [2021-06-12 19:54:17,403 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:17,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:17,496 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:675, output treesize:151 [2021-06-12 19:54:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:17,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496254547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:17,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:17,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 19:54:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126052495] [2021-06-12 19:54:17,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:17,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:17,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:17,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:17,667 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) [2021-06-12 19:54:18,004 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2021-06-12 19:54:18,183 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-06-12 19:54:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:18,344 INFO L93 Difference]: Finished difference Result 234 states and 673 transitions. [2021-06-12 19:54:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:18,344 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 [2021-06-12 19:54:18,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:18,345 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:54:18,345 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:54:18,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1014.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:54:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 201. [2021-06-12 19:54:18,348 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) [2021-06-12 19:54:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 598 transitions. [2021-06-12 19:54:18,348 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 598 transitions. Word has length 17 [2021-06-12 19:54:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:18,348 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 598 transitions. [2021-06-12 19:54:18,348 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) [2021-06-12 19:54:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 598 transitions. [2021-06-12 19:54:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:18,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:18,349 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:18,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2571,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:18,553 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1888263060, now seen corresponding path program 60 times [2021-06-12 19:54:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:18,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372208581] [2021-06-12 19:54:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:18,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372208581] [2021-06-12 19:54:18,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372208581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072160428] [2021-06-12 19:54:18,791 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 [2021-06-12 19:54:18,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:54:18,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:18,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:18,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:19,004 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 15 treesize of output 11 [2021-06-12 19:54:19,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:19,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:19,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:19,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:19,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:19,020 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,023 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 17 treesize of output 13 [2021-06-12 19:54:19,023 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,091 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-12 19:54:19,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:54:19,093 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-12 19:54:19,187 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 [2021-06-12 19:54:19,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:19,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:19,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,249 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-06-12 19:54:19,249 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-06-12 19:54:19,252 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 21 treesize of output 17 [2021-06-12 19:54:19,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,255 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 28 treesize of output 22 [2021-06-12 19:54:19,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,258 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 19 treesize of output 15 [2021-06-12 19:54:19,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:19,281 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:54:19,281 INFO L518 ElimStorePlain]: Eliminatee v_prenex_717 vanished before elimination [2021-06-12 19:54:19,281 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:19,281 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:54:19,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:54:19,282 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-12 19:54:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:19,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072160428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:19,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:19,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:54:19,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655457466] [2021-06-12 19:54:19,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:19,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:19,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:19,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:19,312 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) [2021-06-12 19:54:19,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:19,958 INFO L93 Difference]: Finished difference Result 234 states and 665 transitions. [2021-06-12 19:54:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:54:19,959 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 [2021-06-12 19:54:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:19,959 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:54:19,959 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:54:19,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:54:19,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:54:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 195. [2021-06-12 19:54:19,962 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) [2021-06-12 19:54:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-06-12 19:54:19,962 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 17 [2021-06-12 19:54:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:19,962 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-06-12 19:54:19,962 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) [2021-06-12 19:54:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-06-12 19:54:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:19,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:19,963 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:20,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2603,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:20,165 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:20,173 INFO L82 PathProgramCache]: Analyzing trace with hash 331629366, now seen corresponding path program 61 times [2021-06-12 19:54:20,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:20,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258283334] [2021-06-12 19:54:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:20,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:20,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258283334] [2021-06-12 19:54:20,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258283334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:20,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833252604] [2021-06-12 19:54:20,503 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 [2021-06-12 19:54:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:20,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:20,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:20,618 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 25 treesize of output 19 [2021-06-12 19:54:20,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:20,622 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:20,624 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 [2021-06-12 19:54:20,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,627 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 [2021-06-12 19:54:20,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:20,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:20,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:54:20,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,737 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 27 treesize of output 21 [2021-06-12 19:54:20,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:20,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,741 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 [2021-06-12 19:54:20,741 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,745 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 27 treesize of output 21 [2021-06-12 19:54:20,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,748 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 [2021-06-12 19:54:20,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,753 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 18 treesize of output 14 [2021-06-12 19:54:20,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,757 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 35 treesize of output 27 [2021-06-12 19:54:20,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:20,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,761 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 37 treesize of output 29 [2021-06-12 19:54:20,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:20,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,766 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 25 treesize of output 19 [2021-06-12 19:54:20,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,770 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 [2021-06-12 19:54:20,771 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,774 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 [2021-06-12 19:54:20,775 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,924 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 19:54:20,925 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-12 19:54:20,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,928 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 10 treesize of output 5 [2021-06-12 19:54:20,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,932 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 20 treesize of output 9 [2021-06-12 19:54:20,932 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,935 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 21 treesize of output 7 [2021-06-12 19:54:20,936 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,939 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 [2021-06-12 19:54:20,940 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:20,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,950 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 12 treesize of output 5 [2021-06-12 19:54:20,951 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,953 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 44 treesize of output 19 [2021-06-12 19:54:20,954 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,957 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 12 treesize of output 5 [2021-06-12 19:54:20,957 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,969 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 21 treesize of output 7 [2021-06-12 19:54:20,970 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,972 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 11 treesize of output 3 [2021-06-12 19:54:20,973 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:21,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:21,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:21,039 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:54:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:21,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833252604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:21,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:21,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:54:21,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730218771] [2021-06-12 19:54:21,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:21,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:21,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:21,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:21,170 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) [2021-06-12 19:54:21,873 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:54:22,153 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:54:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:22,210 INFO L93 Difference]: Finished difference Result 235 states and 681 transitions. [2021-06-12 19:54:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:54:22,210 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 [2021-06-12 19:54:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:22,210 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:54:22,210 INFO L226 Difference]: Without dead ends: 227 [2021-06-12 19:54:22,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1159.8ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:54:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-12 19:54:22,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 197. [2021-06-12 19:54:22,213 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) [2021-06-12 19:54:22,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-06-12 19:54:22,214 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-06-12 19:54:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:22,214 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-06-12 19:54:22,214 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) [2021-06-12 19:54:22,214 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-06-12 19:54:22,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:22,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:22,215 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:22,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2626 [2021-06-12 19:54:22,425 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -483176788, now seen corresponding path program 62 times [2021-06-12 19:54:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:22,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467156149] [2021-06-12 19:54:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:22,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:22,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467156149] [2021-06-12 19:54:22,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467156149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:22,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262241816] [2021-06-12 19:54:22,715 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 [2021-06-12 19:54:22,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:22,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:22,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:22,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:22,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,879 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 17 treesize of output 13 [2021-06-12 19:54:22,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,883 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 [2021-06-12 19:54:22,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,935 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 25 treesize of output 19 [2021-06-12 19:54:22,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,939 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 27 treesize of output 21 [2021-06-12 19:54:22,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:22,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:22,994 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. [2021-06-12 19:54:22,994 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:167, output treesize:157 [2021-06-12 19:54:23,151 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-12 19:54:23,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,155 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 19 treesize of output 15 [2021-06-12 19:54:23,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,160 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 25 treesize of output 19 [2021-06-12 19:54:23,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,165 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 [2021-06-12 19:54:23,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,170 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 [2021-06-12 19:54:23,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,175 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 38 treesize of output 30 [2021-06-12 19:54:23,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:23,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,181 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 35 treesize of output 27 [2021-06-12 19:54:23,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:23,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,187 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 17 treesize of output 13 [2021-06-12 19:54:23,188 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,193 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 28 treesize of output 22 [2021-06-12 19:54:23,194 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,198 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 27 treesize of output 21 [2021-06-12 19:54:23,199 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:23,204 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 29 treesize of output 23 [2021-06-12 19:54:23,204 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:23,473 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-12 19:54:23,473 INFO L628 ElimStorePlain]: treesize reduction 152, result has 72.5 percent of original size [2021-06-12 19:54:23,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,478 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 9 treesize of output 3 [2021-06-12 19:54:23,479 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,484 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 [2021-06-12 19:54:23,484 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,489 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 21 treesize of output 7 [2021-06-12 19:54:23,489 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,494 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 11 treesize of output 3 [2021-06-12 19:54:23,494 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:23,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,507 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 24 treesize of output 9 [2021-06-12 19:54:23,507 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,512 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 46 treesize of output 15 [2021-06-12 19:54:23,512 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:23,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,529 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 [2021-06-12 19:54:23,529 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,533 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 20 treesize of output 9 [2021-06-12 19:54:23,534 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:23,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,546 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 [2021-06-12 19:54:23,547 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,551 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 12 treesize of output 5 [2021-06-12 19:54:23,552 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:23,556 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 24 treesize of output 9 [2021-06-12 19:54:23,556 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:23,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:23,674 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 19:54:23,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:23,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:23,678 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:457, output treesize:197 [2021-06-12 19:54:23,802 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-06-12 19:54:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:23,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262241816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:23,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:23,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:54:23,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642045138] [2021-06-12 19:54:23,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:23,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:23,861 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) [2021-06-12 19:54:24,384 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 19:54:24,558 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-12 19:54:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:24,629 INFO L93 Difference]: Finished difference Result 221 states and 648 transitions. [2021-06-12 19:54:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:24,629 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 [2021-06-12 19:54:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:24,630 INFO L225 Difference]: With dead ends: 221 [2021-06-12 19:54:24,630 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:54:24,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1033.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:54:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-06-12 19:54:24,632 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) [2021-06-12 19:54:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-06-12 19:54:24,632 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 17 [2021-06-12 19:54:24,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:24,632 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-06-12 19:54:24,632 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) [2021-06-12 19:54:24,632 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-06-12 19:54:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:24,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:24,633 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:24,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2642 [2021-06-12 19:54:24,833 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash 538722348, now seen corresponding path program 63 times [2021-06-12 19:54:24,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:24,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260501027] [2021-06-12 19:54:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:25,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:25,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260501027] [2021-06-12 19:54:25,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260501027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:25,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837666239] [2021-06-12 19:54:25,020 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 [2021-06-12 19:54:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:25,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:25,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,108 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 27 treesize of output 21 [2021-06-12 19:54:25,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:25,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,112 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 [2021-06-12 19:54:25,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,116 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 [2021-06-12 19:54:25,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,120 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 17 treesize of output 13 [2021-06-12 19:54:25,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:25,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:25,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:185, output treesize:175 [2021-06-12 19:54:25,590 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_734, array_4], 21=[array_2, v_prenex_733]} [2021-06-12 19:54:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,597 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 15 treesize of output 11 [2021-06-12 19:54:25,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,604 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 [2021-06-12 19:54:25,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,610 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 25 treesize of output 19 [2021-06-12 19:54:25,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,617 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 17 treesize of output 13 [2021-06-12 19:54:25,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,624 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 19 treesize of output 15 [2021-06-12 19:54:25,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,630 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 28 treesize of output 22 [2021-06-12 19:54:25,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,794 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2021-06-12 19:54:25,794 INFO L628 ElimStorePlain]: treesize reduction 117, result has 70.2 percent of original size [2021-06-12 19:54:25,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,800 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 27 treesize of output 21 [2021-06-12 19:54:25,801 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:25,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,806 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 [2021-06-12 19:54:25,807 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,812 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 38 treesize of output 30 [2021-06-12 19:54:25,813 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:25,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,818 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 29 treesize of output 23 [2021-06-12 19:54:25,819 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:25,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:25,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,926 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 20 treesize of output 9 [2021-06-12 19:54:25,926 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,932 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 10 treesize of output 5 [2021-06-12 19:54:25,932 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:25,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,947 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 24 treesize of output 9 [2021-06-12 19:54:25,948 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,953 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 46 treesize of output 15 [2021-06-12 19:54:25,953 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:25,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,971 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 21 treesize of output 7 [2021-06-12 19:54:25,972 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,977 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 11 treesize of output 3 [2021-06-12 19:54:25,978 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:25,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,991 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 12 treesize of output 5 [2021-06-12 19:54:25,992 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,996 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 24 treesize of output 9 [2021-06-12 19:54:25,997 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:26,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:26,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,100 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 9 treesize of output 3 [2021-06-12 19:54:26,100 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,105 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 11 treesize of output 3 [2021-06-12 19:54:26,106 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,110 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 [2021-06-12 19:54:26,111 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:26,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 4 dim-1 vars, End of recursive call: and 12 xjuncts. [2021-06-12 19:54:26,201 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 18 variables, input treesize:435, output treesize:112 [2021-06-12 19:54:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:26,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837666239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:26,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:26,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:54:26,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806867588] [2021-06-12 19:54:26,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:26,258 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) [2021-06-12 19:54:26,633 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-06-12 19:54:26,920 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 106 [2021-06-12 19:54:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:27,054 INFO L93 Difference]: Finished difference Result 219 states and 638 transitions. [2021-06-12 19:54:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:27,054 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 [2021-06-12 19:54:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:27,054 INFO L225 Difference]: With dead ends: 219 [2021-06-12 19:54:27,054 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 19:54:27,055 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 19:54:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 199. [2021-06-12 19:54:27,057 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) [2021-06-12 19:54:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-12 19:54:27,057 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-12 19:54:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:27,057 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-12 19:54:27,057 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) [2021-06-12 19:54:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-12 19:54:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:27,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:27,058 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:27,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2680,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:27,258 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1954391240, now seen corresponding path program 64 times [2021-06-12 19:54:27,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:27,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290074772] [2021-06-12 19:54:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:27,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:27,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290074772] [2021-06-12 19:54:27,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290074772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:27,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856183477] [2021-06-12 19:54:27,481 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 [2021-06-12 19:54:27,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:27,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,618 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 [2021-06-12 19:54:27,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,623 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 25 treesize of output 19 [2021-06-12 19:54:27,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,626 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 35 treesize of output 27 [2021-06-12 19:54:27,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:27,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,631 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 [2021-06-12 19:54:27,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:27,709 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. [2021-06-12 19:54:27,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:187, output treesize:247 [2021-06-12 19:54:27,900 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-06-12 19:54:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,905 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 27 treesize of output 21 [2021-06-12 19:54:27,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:27,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,911 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 [2021-06-12 19:54:27,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,917 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 27 treesize of output 21 [2021-06-12 19:54:27,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:27,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,924 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 46 treesize of output 36 [2021-06-12 19:54:27,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,930 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 30 treesize of output 24 [2021-06-12 19:54:27,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,936 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 48 treesize of output 38 [2021-06-12 19:54:27,937 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,942 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 [2021-06-12 19:54:27,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,949 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 25 treesize of output 19 [2021-06-12 19:54:27,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,956 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 17 treesize of output 13 [2021-06-12 19:54:27,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:27,963 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,969 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 28 treesize of output 22 [2021-06-12 19:54:27,969 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,975 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 [2021-06-12 19:54:27,976 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:27,981 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,986 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 15 treesize of output 11 [2021-06-12 19:54:27,986 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,225 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-12 19:54:28,225 INFO L628 ElimStorePlain]: treesize reduction 209, result has 62.5 percent of original size [2021-06-12 19:54:28,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,230 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 12 treesize of output 5 [2021-06-12 19:54:28,231 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,240 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 44 treesize of output 19 [2021-06-12 19:54:28,240 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,245 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 21 treesize of output 7 [2021-06-12 19:54:28,245 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,250 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 21 treesize of output 7 [2021-06-12 19:54:28,250 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,254 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 12 treesize of output 5 [2021-06-12 19:54:28,255 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,259 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 21 treesize of output 7 [2021-06-12 19:54:28,259 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,263 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 11 treesize of output 3 [2021-06-12 19:54:28,264 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,275 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 [2021-06-12 19:54:28,276 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,279 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 20 treesize of output 9 [2021-06-12 19:54:28,280 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:28,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:28,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:28,386 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 7 variables, input treesize:705, output treesize:139 [2021-06-12 19:54:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:28,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856183477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:28,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:28,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:54:28,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362739853] [2021-06-12 19:54:28,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:28,527 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) [2021-06-12 19:54:28,820 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2021-06-12 19:54:29,002 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:54:29,209 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 19:54:29,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:29,245 INFO L93 Difference]: Finished difference Result 242 states and 690 transitions. [2021-06-12 19:54:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:29,245 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 [2021-06-12 19:54:29,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:29,246 INFO L225 Difference]: With dead ends: 242 [2021-06-12 19:54:29,246 INFO L226 Difference]: Without dead ends: 238 [2021-06-12 19:54:29,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-12 19:54:29,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 199. [2021-06-12 19:54:29,248 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) [2021-06-12 19:54:29,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 591 transitions. [2021-06-12 19:54:29,249 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 591 transitions. Word has length 17 [2021-06-12 19:54:29,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:29,249 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 591 transitions. [2021-06-12 19:54:29,249 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) [2021-06-12 19:54:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 591 transitions. [2021-06-12 19:54:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:29,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:29,249 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:29,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2701 [2021-06-12 19:54:29,461 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1798257188, now seen corresponding path program 65 times [2021-06-12 19:54:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:29,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903907968] [2021-06-12 19:54:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:29,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:29,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903907968] [2021-06-12 19:54:29,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903907968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:29,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700500140] [2021-06-12 19:54:29,633 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 [2021-06-12 19:54:29,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:29,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:29,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:29,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,772 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 25 treesize of output 19 [2021-06-12 19:54:29,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,777 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 27 treesize of output 21 [2021-06-12 19:54:29,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:29,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,782 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 [2021-06-12 19:54:29,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,786 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 17 treesize of output 13 [2021-06-12 19:54:29,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:29,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:29,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-12 19:54:30,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,106 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 27 treesize of output 21 [2021-06-12 19:54:30,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:30,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,112 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 17 treesize of output 13 [2021-06-12 19:54:30,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,323 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-06-12 19:54:30,323 INFO L628 ElimStorePlain]: treesize reduction 94, result has 77.0 percent of original size [2021-06-12 19:54:30,327 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 7 treesize of output 5 [2021-06-12 19:54:30,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,423 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-12 19:54:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,428 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 29 treesize of output 23 [2021-06-12 19:54:30,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,434 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 19 treesize of output 15 [2021-06-12 19:54:30,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,439 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 38 treesize of output 30 [2021-06-12 19:54:30,440 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,444 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 [2021-06-12 19:54:30,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,549 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 24 treesize of output 9 [2021-06-12 19:54:30,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,554 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 12 treesize of output 5 [2021-06-12 19:54:30,554 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,567 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 21 treesize of output 7 [2021-06-12 19:54:30,567 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,572 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 [2021-06-12 19:54:30,573 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,577 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 24 treesize of output 9 [2021-06-12 19:54:30,578 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,582 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 46 treesize of output 15 [2021-06-12 19:54:30,583 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,691 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 27 treesize of output 21 [2021-06-12 19:54:30,692 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:30,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,794 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 20 treesize of output 9 [2021-06-12 19:54:30,795 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,798 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 10 treesize of output 5 [2021-06-12 19:54:30,799 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,905 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 11 treesize of output 3 [2021-06-12 19:54:30,906 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,910 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 21 treesize of output 7 [2021-06-12 19:54:30,910 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:30,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,921 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 [2021-06-12 19:54:30,921 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:31,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:31,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:31,020 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:404, output treesize:170 [2021-06-12 19:54:31,155 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-12 19:54:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:31,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700500140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:31,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:31,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:31,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665143807] [2021-06-12 19:54:31,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:31,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:31,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:31,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:31,214 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) [2021-06-12 19:54:31,515 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-12 19:54:31,844 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-12 19:54:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:31,906 INFO L93 Difference]: Finished difference Result 234 states and 676 transitions. [2021-06-12 19:54:31,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:31,907 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 [2021-06-12 19:54:31,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:31,907 INFO L225 Difference]: With dead ends: 234 [2021-06-12 19:54:31,907 INFO L226 Difference]: Without dead ends: 230 [2021-06-12 19:54:31,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 902.5ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-12 19:54:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 197. [2021-06-12 19:54:31,909 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) [2021-06-12 19:54:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 583 transitions. [2021-06-12 19:54:31,910 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 583 transitions. Word has length 17 [2021-06-12 19:54:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:31,910 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 583 transitions. [2021-06-12 19:54:31,910 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) [2021-06-12 19:54:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 583 transitions. [2021-06-12 19:54:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:31,910 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:31,910 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:32,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2735,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:32,111 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash 881305860, now seen corresponding path program 66 times [2021-06-12 19:54:32,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:32,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409409082] [2021-06-12 19:54:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:32,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:32,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409409082] [2021-06-12 19:54:32,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409409082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:32,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643121272] [2021-06-12 19:54:32,259 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 [2021-06-12 19:54:32,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:32,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:32,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,406 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 15 treesize of output 11 [2021-06-12 19:54:32,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,411 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 [2021-06-12 19:54:32,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,416 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 [2021-06-12 19:54:32,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,420 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 27 treesize of output 21 [2021-06-12 19:54:32,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:32,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:32,476 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. [2021-06-12 19:54:32,476 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:137 [2021-06-12 19:54:32,621 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 36=[array_2]} [2021-06-12 19:54:32,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,626 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 38 treesize of output 30 [2021-06-12 19:54:32,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:32,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,631 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 35 treesize of output 27 [2021-06-12 19:54:32,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:32,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,638 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 17 treesize of output 13 [2021-06-12 19:54:32,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,644 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 15 treesize of output 11 [2021-06-12 19:54:32,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,650 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 [2021-06-12 19:54:32,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,656 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 19 treesize of output 15 [2021-06-12 19:54:32,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,662 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 28 treesize of output 22 [2021-06-12 19:54:32,663 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,668 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 29 treesize of output 23 [2021-06-12 19:54:32,669 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:32,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,674 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 27 treesize of output 21 [2021-06-12 19:54:32,675 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:32,679 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 [2021-06-12 19:54:32,680 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,927 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 84 [2021-06-12 19:54:32,927 INFO L628 ElimStorePlain]: treesize reduction 152, result has 72.5 percent of original size [2021-06-12 19:54:32,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,932 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 20 treesize of output 9 [2021-06-12 19:54:32,933 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,937 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 20 treesize of output 9 [2021-06-12 19:54:32,938 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,950 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 9 treesize of output 3 [2021-06-12 19:54:32,951 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,956 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 21 treesize of output 7 [2021-06-12 19:54:32,956 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,961 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 24 treesize of output 9 [2021-06-12 19:54:32,961 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,966 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 15 [2021-06-12 19:54:32,967 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:32,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,983 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 24 treesize of output 9 [2021-06-12 19:54:32,983 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,987 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 12 treesize of output 5 [2021-06-12 19:54:32,988 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,000 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 [2021-06-12 19:54:33,000 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,004 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 21 treesize of output 7 [2021-06-12 19:54:33,005 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:33,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:54:33,021 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,127 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 19:54:33,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:33,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:33,131 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 10 variables, input treesize:457, output treesize:213 [2021-06-12 19:54:33,263 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-06-12 19:54:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:33,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643121272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:33,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:33,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:54:33,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987120506] [2021-06-12 19:54:33,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:54:33,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:33,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:54:33,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:54:33,322 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) [2021-06-12 19:54:33,760 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 19:54:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:33,826 INFO L93 Difference]: Finished difference Result 221 states and 648 transitions. [2021-06-12 19:54:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:54:33,826 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 [2021-06-12 19:54:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:33,827 INFO L225 Difference]: With dead ends: 221 [2021-06-12 19:54:33,827 INFO L226 Difference]: Without dead ends: 217 [2021-06-12 19:54:33,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-12 19:54:33,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194. [2021-06-12 19:54:33,829 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) [2021-06-12 19:54:33,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 574 transitions. [2021-06-12 19:54:33,829 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 574 transitions. Word has length 17 [2021-06-12 19:54:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:33,829 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 574 transitions. [2021-06-12 19:54:33,829 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) [2021-06-12 19:54:33,830 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 574 transitions. [2021-06-12 19:54:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:33,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:33,830 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:34,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2795 [2021-06-12 19:54:34,033 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1017508532, now seen corresponding path program 67 times [2021-06-12 19:54:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:34,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521017815] [2021-06-12 19:54:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:34,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521017815] [2021-06-12 19:54:34,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521017815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507139739] [2021-06-12 19:54:34,371 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 [2021-06-12 19:54:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:34,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:34,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:34,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:34,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:34,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:34,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,492 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 25 treesize of output 19 [2021-06-12 19:54:34,493 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:34,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:54:34,516 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:77 [2021-06-12 19:54:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,618 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 [2021-06-12 19:54:34,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:34,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,622 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 28 treesize of output 22 [2021-06-12 19:54:34,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,634 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 [2021-06-12 19:54:34,635 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,638 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 35 treesize of output 27 [2021-06-12 19:54:34,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,643 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 37 treesize of output 29 [2021-06-12 19:54:34,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:34,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,648 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 17 treesize of output 13 [2021-06-12 19:54:34,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,652 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 25 treesize of output 19 [2021-06-12 19:54:34,653 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,656 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 18 treesize of output 14 [2021-06-12 19:54:34,657 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,661 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 [2021-06-12 19:54:34,662 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,678 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 27 treesize of output 21 [2021-06-12 19:54:34,679 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,863 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 19:54:34,863 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-12 19:54:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,867 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 10 treesize of output 5 [2021-06-12 19:54:34,868 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,872 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 20 treesize of output 9 [2021-06-12 19:54:34,873 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,877 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 21 treesize of output 7 [2021-06-12 19:54:34,878 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,882 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 11 treesize of output 3 [2021-06-12 19:54:34,883 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:34,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,895 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 12 treesize of output 5 [2021-06-12 19:54:34,896 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:54:34,901 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,904 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 12 treesize of output 5 [2021-06-12 19:54:34,905 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:34,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,920 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 21 treesize of output 7 [2021-06-12 19:54:34,921 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,924 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 11 treesize of output 3 [2021-06-12 19:54:34,925 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:35,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:35,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:35,005 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:54:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:35,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507139739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:35,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:35,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:54:35,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672817047] [2021-06-12 19:54:35,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:35,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:35,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:35,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:35,145 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) [2021-06-12 19:54:35,473 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 19:54:35,784 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 19:54:35,935 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2021-06-12 19:54:36,242 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2021-06-12 19:54:36,550 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 95 [2021-06-12 19:54:36,825 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 95 [2021-06-12 19:54:37,154 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-06-12 19:54:37,485 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 98 [2021-06-12 19:54:37,798 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 99 [2021-06-12 19:54:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:37,862 INFO L93 Difference]: Finished difference Result 325 states and 931 transitions. [2021-06-12 19:54:37,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:54:37,862 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 17 [2021-06-12 19:54:37,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:37,863 INFO L225 Difference]: With dead ends: 325 [2021-06-12 19:54:37,863 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 19:54:37,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2817.7ms TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:54:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 19:54:37,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 202. [2021-06-12 19:54:37,865 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) [2021-06-12 19:54:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 598 transitions. [2021-06-12 19:54:37,866 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 598 transitions. Word has length 17 [2021-06-12 19:54:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:37,866 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 598 transitions. [2021-06-12 19:54:37,866 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) [2021-06-12 19:54:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 598 transitions. [2021-06-12 19:54:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:37,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:37,866 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:38,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2834,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:38,067 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:38,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash -56410218, now seen corresponding path program 68 times [2021-06-12 19:54:38,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:38,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433141109] [2021-06-12 19:54:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:38,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:38,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433141109] [2021-06-12 19:54:38,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433141109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:38,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934925324] [2021-06-12 19:54:38,323 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 [2021-06-12 19:54:38,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:38,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:38,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:38,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:38,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,492 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 [2021-06-12 19:54:38,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,496 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 [2021-06-12 19:54:38,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:38,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,502 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 25 treesize of output 19 [2021-06-12 19:54:38,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,506 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 25 treesize of output 19 [2021-06-12 19:54:38,506 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:38,582 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. [2021-06-12 19:54:38,582 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:179, output treesize:235 [2021-06-12 19:54:38,915 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]} [2021-06-12 19:54:38,920 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 29 treesize of output 23 [2021-06-12 19:54:38,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:38,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,031 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-06-12 19:54:39,032 INFO L628 ElimStorePlain]: treesize reduction 130, result has 57.7 percent of original size [2021-06-12 19:54:39,035 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 27 treesize of output 21 [2021-06-12 19:54:39,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:39,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,083 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 27 treesize of output 21 [2021-06-12 19:54:39,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:39,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,138 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 29 treesize of output 23 [2021-06-12 19:54:39,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,189 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 [2021-06-12 19:54:39,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,239 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 24 treesize of output 9 [2021-06-12 19:54:39,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,243 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 20 treesize of output 9 [2021-06-12 19:54:39,244 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,291 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 [2021-06-12 19:54:39,292 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,295 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 21 treesize of output 7 [2021-06-12 19:54:39,296 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,350 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 [2021-06-12 19:54:39,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,353 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 [2021-06-12 19:54:39,354 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,405 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 12 treesize of output 5 [2021-06-12 19:54:39,405 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:39,446 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-06-12 19:54:39,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:39,448 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 15 variables, input treesize:319, output treesize:62 [2021-06-12 19:54:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:39,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934925324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:39,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:39,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:54:39,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388633668] [2021-06-12 19:54:39,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:39,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:39,496 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) [2021-06-12 19:54:39,945 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2021-06-12 19:54:40,200 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 117 [2021-06-12 19:54:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:40,370 INFO L93 Difference]: Finished difference Result 277 states and 801 transitions. [2021-06-12 19:54:40,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:40,370 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 [2021-06-12 19:54:40,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:40,371 INFO L225 Difference]: With dead ends: 277 [2021-06-12 19:54:40,371 INFO L226 Difference]: Without dead ends: 273 [2021-06-12 19:54:40,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1115.7ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-12 19:54:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 206. [2021-06-12 19:54:40,373 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) [2021-06-12 19:54:40,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 612 transitions. [2021-06-12 19:54:40,373 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 612 transitions. Word has length 17 [2021-06-12 19:54:40,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:40,374 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 612 transitions. [2021-06-12 19:54:40,374 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) [2021-06-12 19:54:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 612 transitions. [2021-06-12 19:54:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:40,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:40,374 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:40,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2850 [2021-06-12 19:54:40,574 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:40,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash -303030390, now seen corresponding path program 69 times [2021-06-12 19:54:40,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:40,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563063684] [2021-06-12 19:54:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:40,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:40,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563063684] [2021-06-12 19:54:40,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563063684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:40,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042016431] [2021-06-12 19:54:40,828 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 [2021-06-12 19:54:40,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:54:40,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:40,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:40,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:40,967 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 25 treesize of output 19 [2021-06-12 19:54:40,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:40,971 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 [2021-06-12 19:54:40,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:40,975 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 [2021-06-12 19:54:40,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:40,979 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 17 treesize of output 13 [2021-06-12 19:54:40,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:41,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:41,015 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:54:41,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,117 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 27 treesize of output 21 [2021-06-12 19:54:41,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:41,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,122 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 17 treesize of output 13 [2021-06-12 19:54:41,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,127 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 [2021-06-12 19:54:41,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,132 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 28 treesize of output 22 [2021-06-12 19:54:41,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:41,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,138 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 18 treesize of output 14 [2021-06-12 19:54:41,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,143 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 35 treesize of output 27 [2021-06-12 19:54:41,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,148 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 37 treesize of output 29 [2021-06-12 19:54:41,149 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:41,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,152 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 25 treesize of output 19 [2021-06-12 19:54:41,153 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,156 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 [2021-06-12 19:54:41,157 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,160 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 15 treesize of output 11 [2021-06-12 19:54:41,161 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,304 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 19:54:41,304 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-12 19:54:41,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,308 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 10 treesize of output 5 [2021-06-12 19:54:41,308 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,311 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 20 treesize of output 9 [2021-06-12 19:54:41,312 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,315 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 21 treesize of output 7 [2021-06-12 19:54:41,316 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,318 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 11 treesize of output 3 [2021-06-12 19:54:41,319 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:41,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,329 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 12 treesize of output 5 [2021-06-12 19:54:41,329 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,332 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 44 treesize of output 19 [2021-06-12 19:54:41,333 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,336 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 12 treesize of output 5 [2021-06-12 19:54:41,336 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:41,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,348 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 21 treesize of output 7 [2021-06-12 19:54:41,349 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,352 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 11 treesize of output 3 [2021-06-12 19:54:41,353 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:41,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:41,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:41,422 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:54:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:41,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042016431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:41,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:41,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 19:54:41,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251435717] [2021-06-12 19:54:41,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:41,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:41,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:41,566 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) [2021-06-12 19:54:41,938 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-12 19:54:42,163 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-06-12 19:54:42,386 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 19:54:42,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:42,423 INFO L93 Difference]: Finished difference Result 288 states and 834 transitions. [2021-06-12 19:54:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:42,423 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 [2021-06-12 19:54:42,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:42,424 INFO L225 Difference]: With dead ends: 288 [2021-06-12 19:54:42,424 INFO L226 Difference]: Without dead ends: 284 [2021-06-12 19:54:42,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1087.0ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-12 19:54:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 204. [2021-06-12 19:54:42,427 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) [2021-06-12 19:54:42,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 604 transitions. [2021-06-12 19:54:42,428 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 604 transitions. Word has length 17 [2021-06-12 19:54:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:42,428 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 604 transitions. [2021-06-12 19:54:42,428 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) [2021-06-12 19:54:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 604 transitions. [2021-06-12 19:54:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:42,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:42,429 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:42,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2877 [2021-06-12 19:54:42,651 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash -129782698, now seen corresponding path program 70 times [2021-06-12 19:54:42,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:42,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373489725] [2021-06-12 19:54:42,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:42,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373489725] [2021-06-12 19:54:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373489725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:42,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338250024] [2021-06-12 19:54:42,808 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 [2021-06-12 19:54:42,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:42,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:54:42,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:43,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,046 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 [2021-06-12 19:54:43,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,050 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 [2021-06-12 19:54:43,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:43,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,111 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 15 treesize of output 11 [2021-06-12 19:54:43,111 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,115 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 [2021-06-12 19:54:43,115 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,177 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. [2021-06-12 19:54:43,177 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-06-12 19:54:43,351 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-12 19:54:43,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,356 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 29 treesize of output 23 [2021-06-12 19:54:43,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,361 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 [2021-06-12 19:54:43,363 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:43,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,368 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 [2021-06-12 19:54:43,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,373 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 [2021-06-12 19:54:43,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,379 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 [2021-06-12 19:54:43,380 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,384 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 35 treesize of output 27 [2021-06-12 19:54:43,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:43,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,391 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 28 treesize of output 22 [2021-06-12 19:54:43,392 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,397 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 38 treesize of output 30 [2021-06-12 19:54:43,398 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:43,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,404 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 19 treesize of output 15 [2021-06-12 19:54:43,404 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,409 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 25 treesize of output 19 [2021-06-12 19:54:43,410 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,689 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 77 [2021-06-12 19:54:43,690 INFO L628 ElimStorePlain]: treesize reduction 288, result has 57.1 percent of original size [2021-06-12 19:54:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,695 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 [2021-06-12 19:54:43,695 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,700 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 10 treesize of output 5 [2021-06-12 19:54:43,700 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,712 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 12 treesize of output 5 [2021-06-12 19:54:43,713 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,717 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 24 treesize of output 9 [2021-06-12 19:54:43,718 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,731 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 [2021-06-12 19:54:43,732 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,736 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 46 treesize of output 15 [2021-06-12 19:54:43,737 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,753 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 11 treesize of output 3 [2021-06-12 19:54:43,753 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,757 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 [2021-06-12 19:54:43,758 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,763 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 11 treesize of output 3 [2021-06-12 19:54:43,763 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,767 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 21 treesize of output 7 [2021-06-12 19:54:43,767 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,876 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 19:54:43,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:43,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:43,880 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:505, output treesize:199 [2021-06-12 19:54:44,026 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-12 19:54:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:44,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338250024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:44,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:44,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:54:44,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573017006] [2021-06-12 19:54:44,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:54:44,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:44,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:54:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:54:44,113 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) [2021-06-12 19:54:44,703 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 96 [2021-06-12 19:54:44,889 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-12 19:54:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:44,972 INFO L93 Difference]: Finished difference Result 278 states and 809 transitions. [2021-06-12 19:54:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:54:44,973 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 [2021-06-12 19:54:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:44,973 INFO L225 Difference]: With dead ends: 278 [2021-06-12 19:54:44,973 INFO L226 Difference]: Without dead ends: 274 [2021-06-12 19:54:44,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1062.7ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-12 19:54:44,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 198. [2021-06-12 19:54:44,976 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) [2021-06-12 19:54:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 586 transitions. [2021-06-12 19:54:44,977 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 586 transitions. Word has length 17 [2021-06-12 19:54:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:44,977 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 586 transitions. [2021-06-12 19:54:44,977 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) [2021-06-12 19:54:44,977 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 586 transitions. [2021-06-12 19:54:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:44,977 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:44,977 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:45,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2893 [2021-06-12 19:54:45,189 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:45,189 INFO L82 PathProgramCache]: Analyzing trace with hash -28866952, now seen corresponding path program 71 times [2021-06-12 19:54:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440251992] [2021-06-12 19:54:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:45,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:45,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440251992] [2021-06-12 19:54:45,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440251992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485130877] [2021-06-12 19:54:45,437 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 [2021-06-12 19:54:45,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:45,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,636 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 15 treesize of output 11 [2021-06-12 19:54:45,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:45,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,642 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 25 treesize of output 19 [2021-06-12 19:54:45,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:45,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,648 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 [2021-06-12 19:54:45,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:45,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,652 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 35 treesize of output 27 [2021-06-12 19:54:45,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:45,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:45,740 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. [2021-06-12 19:54:45,740 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:199, output treesize:255 [2021-06-12 19:54:46,078 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]} [2021-06-12 19:54:46,083 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 25 treesize of output 19 [2021-06-12 19:54:46,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,088 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 [2021-06-12 19:54:46,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:46,193 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-12 19:54:46,193 INFO L628 ElimStorePlain]: treesize reduction 164, result has 48.9 percent of original size [2021-06-12 19:54:46,197 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 [2021-06-12 19:54:46,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:46,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,242 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 29 treesize of output 23 [2021-06-12 19:54:46,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,284 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 7 treesize of output 5 [2021-06-12 19:54:46,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,325 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 [2021-06-12 19:54:46,326 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_789 vanished before elimination [2021-06-12 19:54:46,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,365 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 [2021-06-12 19:54:46,366 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,369 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 [2021-06-12 19:54:46,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,415 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 11 treesize of output 3 [2021-06-12 19:54:46,415 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,418 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 [2021-06-12 19:54:46,419 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:46,466 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 12 treesize of output 5 [2021-06-12 19:54:46,466 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:46,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:46,499 INFO L518 ElimStorePlain]: Eliminatee v_prenex_787 vanished before elimination [2021-06-12 19:54:46,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:46,501 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 15 variables, input treesize:317, output treesize:53 [2021-06-12 19:54:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:46,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485130877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:46,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:46,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:54:46,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186441148] [2021-06-12 19:54:46,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:46,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:46,545 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) [2021-06-12 19:54:46,939 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2021-06-12 19:54:47,219 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 127 [2021-06-12 19:54:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:47,346 INFO L93 Difference]: Finished difference Result 285 states and 823 transitions. [2021-06-12 19:54:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:47,346 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 [2021-06-12 19:54:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:47,347 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:54:47,347 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 19:54:47,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1167.8ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:47,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 19:54:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 204. [2021-06-12 19:54:47,350 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) [2021-06-12 19:54:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 606 transitions. [2021-06-12 19:54:47,350 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 606 transitions. Word has length 17 [2021-06-12 19:54:47,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:47,350 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 606 transitions. [2021-06-12 19:54:47,351 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) [2021-06-12 19:54:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 606 transitions. [2021-06-12 19:54:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:47,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:47,351 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:47,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2944,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:47,551 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:47,552 INFO L82 PathProgramCache]: Analyzing trace with hash -275487124, now seen corresponding path program 72 times [2021-06-12 19:54:47,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:47,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359224423] [2021-06-12 19:54:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:47,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:47,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359224423] [2021-06-12 19:54:47,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359224423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:47,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807751875] [2021-06-12 19:54:47,775 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 [2021-06-12 19:54:47,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:54:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,960 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 15 treesize of output 11 [2021-06-12 19:54:47,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,964 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 35 treesize of output 27 [2021-06-12 19:54:47,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:47,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,972 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 [2021-06-12 19:54:47,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,977 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 [2021-06-12 19:54:47,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:48,047 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. [2021-06-12 19:54:48,047 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:179, output treesize:235 [2021-06-12 19:54:48,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,218 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 27 treesize of output 21 [2021-06-12 19:54:48,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,224 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 [2021-06-12 19:54:48,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,478 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 88 [2021-06-12 19:54:48,478 INFO L628 ElimStorePlain]: treesize reduction 233, result has 62.2 percent of original size [2021-06-12 19:54:48,492 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 27 treesize of output 21 [2021-06-12 19:54:48,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:48,632 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-06-12 19:54:48,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:48,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,638 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 21 treesize of output 7 [2021-06-12 19:54:48,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,644 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 [2021-06-12 19:54:48,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:48,768 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 19:54:48,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,772 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 27 treesize of output 21 [2021-06-12 19:54:48,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,777 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 47 treesize of output 37 [2021-06-12 19:54:48,778 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,783 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 29 treesize of output 23 [2021-06-12 19:54:48,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,788 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 18 treesize of output 14 [2021-06-12 19:54:48,789 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,793 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 29 treesize of output 23 [2021-06-12 19:54:48,794 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:48,798 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,966 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-12 19:54:48,967 INFO L628 ElimStorePlain]: treesize reduction 22, result has 92.7 percent of original size [2021-06-12 19:54:48,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,971 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 46 treesize of output 15 [2021-06-12 19:54:48,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,976 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 [2021-06-12 19:54:48,977 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,981 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 [2021-06-12 19:54:48,982 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,986 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 10 treesize of output 5 [2021-06-12 19:54:48,986 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,990 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 12 treesize of output 5 [2021-06-12 19:54:48,991 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:49,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:49,075 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:49,153 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-06-12 19:54:49,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:49,157 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 11 treesize of output 3 [2021-06-12 19:54:49,157 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,160 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 [2021-06-12 19:54:49,161 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:49,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:49,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:49,247 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:613, output treesize:135 [2021-06-12 19:54:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:49,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807751875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:49,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:49,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:54:49,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284690299] [2021-06-12 19:54:49,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:49,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:49,385 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) [2021-06-12 19:54:49,803 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2021-06-12 19:54:50,132 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-12 19:54:50,390 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 19:54:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:50,447 INFO L93 Difference]: Finished difference Result 296 states and 856 transitions. [2021-06-12 19:54:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:50,448 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 [2021-06-12 19:54:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:50,448 INFO L225 Difference]: With dead ends: 296 [2021-06-12 19:54:50,448 INFO L226 Difference]: Without dead ends: 292 [2021-06-12 19:54:50,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1267.8ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-12 19:54:50,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 202. [2021-06-12 19:54:50,451 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) [2021-06-12 19:54:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 598 transitions. [2021-06-12 19:54:50,451 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 598 transitions. Word has length 17 [2021-06-12 19:54:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:50,451 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 598 transitions. [2021-06-12 19:54:50,451 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) [2021-06-12 19:54:50,451 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 598 transitions. [2021-06-12 19:54:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:50,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:50,452 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:50,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-06-12 19:54:50,652 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -102239432, now seen corresponding path program 73 times [2021-06-12 19:54:50,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:50,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406505947] [2021-06-12 19:54:50,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:50,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:50,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406505947] [2021-06-12 19:54:50,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406505947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:50,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975565414] [2021-06-12 19:54:50,876 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 [2021-06-12 19:54:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:50,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:54:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:51,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,180 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 [2021-06-12 19:54:51,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,184 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 [2021-06-12 19:54:51,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:51,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,261 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 25 treesize of output 19 [2021-06-12 19:54:51,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,266 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 [2021-06-12 19:54:51,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:51,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:51,340 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. [2021-06-12 19:54:51,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:188, output treesize:178 [2021-06-12 19:54:51,547 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-12 19:54:51,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,553 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 35 treesize of output 27 [2021-06-12 19:54:51,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:51,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,561 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 [2021-06-12 19:54:51,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,568 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 19 treesize of output 15 [2021-06-12 19:54:51,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,575 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 29 treesize of output 23 [2021-06-12 19:54:51,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:51,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,583 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 [2021-06-12 19:54:51,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,590 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 35 treesize of output 27 [2021-06-12 19:54:51,592 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:51,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,599 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 25 treesize of output 19 [2021-06-12 19:54:51,599 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,607 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 25 treesize of output 19 [2021-06-12 19:54:51,608 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,614 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 38 treesize of output 30 [2021-06-12 19:54:51,616 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:51,628 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 25 treesize of output 19 [2021-06-12 19:54:51,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,923 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-12 19:54:51,923 INFO L628 ElimStorePlain]: treesize reduction 276, result has 58.9 percent of original size [2021-06-12 19:54:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,928 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 11 treesize of output 3 [2021-06-12 19:54:51,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,933 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 [2021-06-12 19:54:51,934 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,938 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 24 treesize of output 9 [2021-06-12 19:54:51,939 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,951 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 [2021-06-12 19:54:51,952 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,957 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 [2021-06-12 19:54:51,957 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,962 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 21 treesize of output 7 [2021-06-12 19:54:51,962 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:51,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,974 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 24 treesize of output 9 [2021-06-12 19:54:51,975 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,979 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 46 treesize of output 15 [2021-06-12 19:54:51,980 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:51,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,995 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 20 treesize of output 9 [2021-06-12 19:54:51,996 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,999 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 [2021-06-12 19:54:52,000 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:52,108 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 19:54:52,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:52,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:52,112 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:505, output treesize:199 [2021-06-12 19:54:52,261 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-12 19:54:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975565414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:52,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:52,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:54:52,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392253633] [2021-06-12 19:54:52,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:52,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:52,355 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) [2021-06-12 19:54:52,747 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 62 [2021-06-12 19:54:53,020 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-06-12 19:54:53,259 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-12 19:54:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:53,345 INFO L93 Difference]: Finished difference Result 286 states and 831 transitions. [2021-06-12 19:54:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:54:53,346 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 [2021-06-12 19:54:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:53,346 INFO L225 Difference]: With dead ends: 286 [2021-06-12 19:54:53,346 INFO L226 Difference]: Without dead ends: 282 [2021-06-12 19:54:53,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1296.8ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:54:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-12 19:54:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 200. [2021-06-12 19:54:53,348 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) [2021-06-12 19:54:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 592 transitions. [2021-06-12 19:54:53,349 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 592 transitions. Word has length 17 [2021-06-12 19:54:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:53,349 INFO L482 AbstractCegarLoop]: Abstraction has 200 states and 592 transitions. [2021-06-12 19:54:53,349 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) [2021-06-12 19:54:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 592 transitions. [2021-06-12 19:54:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:53,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:53,349 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:53,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-12 19:54:53,550 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:53,550 INFO L82 PathProgramCache]: Analyzing trace with hash -99613656, now seen corresponding path program 74 times [2021-06-12 19:54:53,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:53,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041783678] [2021-06-12 19:54:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:53,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:53,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041783678] [2021-06-12 19:54:53,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041783678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:53,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501939856] [2021-06-12 19:54:53,671 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 [2021-06-12 19:54:53,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:53,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:53,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:53,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,761 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 [2021-06-12 19:54:53,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:53,764 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 17 treesize of output 13 [2021-06-12 19:54:53,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,766 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 25 treesize of output 19 [2021-06-12 19:54:53,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:53,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:54:53,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:91, output treesize:79 [2021-06-12 19:54:53,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,869 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 [2021-06-12 19:54:53,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,872 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 [2021-06-12 19:54:53,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,876 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 28 treesize of output 22 [2021-06-12 19:54:53,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,880 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 25 treesize of output 19 [2021-06-12 19:54:53,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,884 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 38 treesize of output 30 [2021-06-12 19:54:53,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:53,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,888 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 [2021-06-12 19:54:53,889 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,892 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 27 treesize of output 21 [2021-06-12 19:54:53,893 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:53,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:54:53,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:53,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:53,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:54:53,902 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:53,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:53,906 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,056 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-12 19:54:54,056 INFO L628 ElimStorePlain]: treesize reduction 170, result has 59.5 percent of original size [2021-06-12 19:54:54,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,060 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 [2021-06-12 19:54:54,060 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,063 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 21 treesize of output 7 [2021-06-12 19:54:54,064 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:54,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,074 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 11 treesize of output 3 [2021-06-12 19:54:54,074 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,078 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 12 treesize of output 5 [2021-06-12 19:54:54,078 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,081 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 46 treesize of output 15 [2021-06-12 19:54:54,082 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,094 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 [2021-06-12 19:54:54,095 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,098 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 [2021-06-12 19:54:54,098 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:54,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,108 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 21 treesize of output 7 [2021-06-12 19:54:54,109 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,111 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 12 treesize of output 5 [2021-06-12 19:54:54,111 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:54,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:54:54,170 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:347, output treesize:139 [2021-06-12 19:54:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501939856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:54,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:54,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:54:54,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400200165] [2021-06-12 19:54:54,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:54,306 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) [2021-06-12 19:54:55,079 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-12 19:54:55,485 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-12 19:54:55,863 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-12 19:54:56,244 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 81 [2021-06-12 19:54:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:56,300 INFO L93 Difference]: Finished difference Result 328 states and 938 transitions. [2021-06-12 19:54:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:56,300 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 [2021-06-12 19:54:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:56,301 INFO L225 Difference]: With dead ends: 328 [2021-06-12 19:54:56,301 INFO L226 Difference]: Without dead ends: 320 [2021-06-12 19:54:56,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1987.8ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:54:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-12 19:54:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 204. [2021-06-12 19:54:56,304 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) [2021-06-12 19:54:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 604 transitions. [2021-06-12 19:54:56,305 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 604 transitions. Word has length 17 [2021-06-12 19:54:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:56,305 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 604 transitions. [2021-06-12 19:54:56,305 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) [2021-06-12 19:54:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 604 transitions. [2021-06-12 19:54:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:56,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:56,306 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:56,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-12 19:54:56,528 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:56,528 INFO L82 PathProgramCache]: Analyzing trace with hash 61528026, now seen corresponding path program 75 times [2021-06-12 19:54:56,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:56,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710784409] [2021-06-12 19:54:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:56,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:56,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710784409] [2021-06-12 19:54:56,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710784409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705959248] [2021-06-12 19:54:56,708 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 [2021-06-12 19:54:56,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:54:56,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:56,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:56,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,905 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 25 treesize of output 19 [2021-06-12 19:54:56,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,909 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 15 treesize of output 11 [2021-06-12 19:54:56,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,913 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 [2021-06-12 19:54:56,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,986 INFO L628 ElimStorePlain]: treesize reduction 16, result has 88.8 percent of original size [2021-06-12 19:54:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,989 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 17 treesize of output 13 [2021-06-12 19:54:56,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,993 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 19 treesize of output 15 [2021-06-12 19:54:56,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,030 INFO L628 ElimStorePlain]: treesize reduction 45, result has 59.8 percent of original size [2021-06-12 19:54:57,032 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. [2021-06-12 19:54:57,032 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:164, output treesize:67 [2021-06-12 19:54:57,124 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_811, v_prenex_813, array_0], 1=[v_prenex_812, v_prenex_814, array_4]} [2021-06-12 19:54:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:57,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:57,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,195 INFO L628 ElimStorePlain]: treesize reduction 31, result has 79.2 percent of original size [2021-06-12 19:54:57,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:54:57,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,202 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 17 treesize of output 13 [2021-06-12 19:54:57,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:57,231 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 [2021-06-12 19:54:57,232 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:57,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,265 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 10 treesize of output 5 [2021-06-12 19:54:57,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,268 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 12 treesize of output 5 [2021-06-12 19:54:57,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,301 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 11 treesize of output 3 [2021-06-12 19:54:57,302 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,304 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 9 treesize of output 3 [2021-06-12 19:54:57,305 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:57,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,336 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 11 treesize of output 3 [2021-06-12 19:54:57,336 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,338 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 21 treesize of output 7 [2021-06-12 19:54:57,339 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:57,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:57,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:54:57,374 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 9 variables, input treesize:163, output treesize:31 [2021-06-12 19:54:57,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:57,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705959248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:57,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:57,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:54:57,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274989455] [2021-06-12 19:54:57,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:57,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:57,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:57,413 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) [2021-06-12 19:54:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:57,863 INFO L93 Difference]: Finished difference Result 245 states and 716 transitions. [2021-06-12 19:54:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:54:57,864 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 [2021-06-12 19:54:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:57,864 INFO L225 Difference]: With dead ends: 245 [2021-06-12 19:54:57,864 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:54:57,864 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:54:57,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 209. [2021-06-12 19:54:57,866 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) [2021-06-12 19:54:57,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-12 19:54:57,867 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-12 19:54:57,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:57,867 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-12 19:54:57,867 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) [2021-06-12 19:54:57,867 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-12 19:54:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:57,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:57,868 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:58,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-12 19:54:58,073 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1542765896, now seen corresponding path program 76 times [2021-06-12 19:54:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542183721] [2021-06-12 19:54:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:58,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542183721] [2021-06-12 19:54:58,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542183721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345754997] [2021-06-12 19:54:58,346 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 [2021-06-12 19:54:58,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:54:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:58,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,466 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 [2021-06-12 19:54:58,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,471 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 35 treesize of output 27 [2021-06-12 19:54:58,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:54:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,477 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 [2021-06-12 19:54:58,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,481 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 25 treesize of output 19 [2021-06-12 19:54:58,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:58,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:54:58,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:171, output treesize:231 [2021-06-12 19:54:58,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,754 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 15 treesize of output 11 [2021-06-12 19:54:58,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,760 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 25 treesize of output 19 [2021-06-12 19:54:58,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,767 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 27 treesize of output 21 [2021-06-12 19:54:58,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:58,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,774 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 30 treesize of output 24 [2021-06-12 19:54:58,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,782 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 28 treesize of output 22 [2021-06-12 19:54:58,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,789 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 48 treesize of output 38 [2021-06-12 19:54:58,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,796 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 [2021-06-12 19:54:58,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:58,803 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,809 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 46 treesize of output 36 [2021-06-12 19:54:58,810 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:58,816 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,822 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 28 treesize of output 22 [2021-06-12 19:54:58,823 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,827 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 27 treesize of output 21 [2021-06-12 19:54:58,828 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-06-12 19:54:58,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:58,833 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,836 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 30 treesize of output 24 [2021-06-12 19:54:58,837 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,026 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-12 19:54:59,026 INFO L628 ElimStorePlain]: treesize reduction 157, result has 65.0 percent of original size [2021-06-12 19:54:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,031 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 [2021-06-12 19:54:59,031 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,035 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 20 treesize of output 9 [2021-06-12 19:54:59,036 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:59,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,046 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 12 treesize of output 5 [2021-06-12 19:54:59,046 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,050 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 11 treesize of output 3 [2021-06-12 19:54:59,051 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,054 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 21 treesize of output 7 [2021-06-12 19:54:59,055 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,066 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 12 treesize of output 5 [2021-06-12 19:54:59,067 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,071 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 11 treesize of output 3 [2021-06-12 19:54:59,071 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,075 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 21 treesize of output 7 [2021-06-12 19:54:59,076 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,079 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 44 treesize of output 19 [2021-06-12 19:54:59,079 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:54:59,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:54:59,157 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:617, output treesize:169 [2021-06-12 19:54:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345754997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:59,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 19:54:59,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633001494] [2021-06-12 19:54:59,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:59,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:59,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:59,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:59,312 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) [2021-06-12 19:54:59,673 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-12 19:54:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:59,830 INFO L93 Difference]: Finished difference Result 249 states and 718 transitions. [2021-06-12 19:54:59,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:54:59,830 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 [2021-06-12 19:54:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:59,831 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:54:59,831 INFO L226 Difference]: Without dead ends: 245 [2021-06-12 19:54:59,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 787.1ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-12 19:54:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 212. [2021-06-12 19:54:59,834 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) [2021-06-12 19:54:59,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 631 transitions. [2021-06-12 19:54:59,835 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 631 transitions. Word has length 17 [2021-06-12 19:54:59,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:59,835 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 631 transitions. [2021-06-12 19:54:59,835 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) [2021-06-12 19:54:59,835 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 631 transitions. [2021-06-12 19:54:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:59,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:59,836 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:00,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3109 [2021-06-12 19:55:00,049 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -128210120, now seen corresponding path program 77 times [2021-06-12 19:55:00,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:00,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037823550] [2021-06-12 19:55:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:00,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037823550] [2021-06-12 19:55:00,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037823550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871709378] [2021-06-12 19:55:00,242 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 [2021-06-12 19:55:00,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:00,408 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 15 treesize of output 11 [2021-06-12 19:55:00,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,411 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 15 treesize of output 11 [2021-06-12 19:55:00,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,414 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 27 treesize of output 21 [2021-06-12 19:55:00,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:00,418 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 25 treesize of output 19 [2021-06-12 19:55:00,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,421 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 17 treesize of output 13 [2021-06-12 19:55:00,422 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,424 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 17 treesize of output 13 [2021-06-12 19:55:00,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,480 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-12 19:55:00,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:00,481 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-12 19:55:00,553 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 27 treesize of output 21 [2021-06-12 19:55:00,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:00,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:00,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,597 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-06-12 19:55:00,597 INFO L518 ElimStorePlain]: Eliminatee v_prenex_816 vanished before elimination [2021-06-12 19:55:00,597 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:00,599 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 28 treesize of output 22 [2021-06-12 19:55:00,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,601 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 19 treesize of output 15 [2021-06-12 19:55:00,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:00,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,623 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:55:00,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_818 vanished before elimination [2021-06-12 19:55:00,623 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:00,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:00,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-12 19:55:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:00,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871709378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:00,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84354618] [2021-06-12 19:55:00,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:00,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:00,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:00,654 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) [2021-06-12 19:55:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:01,353 INFO L93 Difference]: Finished difference Result 249 states and 710 transitions. [2021-06-12 19:55:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:01,353 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 [2021-06-12 19:55:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:01,354 INFO L225 Difference]: With dead ends: 249 [2021-06-12 19:55:01,354 INFO L226 Difference]: Without dead ends: 241 [2021-06-12 19:55:01,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-06-12 19:55:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2021-06-12 19:55:01,356 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) [2021-06-12 19:55:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 610 transitions. [2021-06-12 19:55:01,356 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 610 transitions. Word has length 17 [2021-06-12 19:55:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:01,357 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 610 transitions. [2021-06-12 19:55:01,357 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) [2021-06-12 19:55:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 610 transitions. [2021-06-12 19:55:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:01,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:01,357 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:01,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3127,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:01,557 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:01,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:01,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2091682306, now seen corresponding path program 78 times [2021-06-12 19:55:01,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:01,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444246009] [2021-06-12 19:55:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:01,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:01,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444246009] [2021-06-12 19:55:01,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444246009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:01,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975374622] [2021-06-12 19:55:01,813 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 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 [2021-06-12 19:55:01,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:01,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:01,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:01,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:01,913 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 [2021-06-12 19:55:01,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:01,916 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 27 treesize of output 21 [2021-06-12 19:55:01,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:01,919 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 15 treesize of output 11 [2021-06-12 19:55:01,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:01,922 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 [2021-06-12 19:55:01,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:01,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:01,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:01,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:55:02,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,035 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 [2021-06-12 19:55:02,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,041 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 [2021-06-12 19:55:02,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:02,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,045 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 28 treesize of output 22 [2021-06-12 19:55:02,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:02,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,050 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 [2021-06-12 19:55:02,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,054 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 35 treesize of output 27 [2021-06-12 19:55:02,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:02,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,072 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 37 treesize of output 29 [2021-06-12 19:55:02,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:02,079 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:02,080 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,085 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 18 treesize of output 14 [2021-06-12 19:55:02,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,090 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 [2021-06-12 19:55:02,091 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,095 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 27 treesize of output 21 [2021-06-12 19:55:02,096 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,260 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 19:55:02,260 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-12 19:55:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,264 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 10 treesize of output 5 [2021-06-12 19:55:02,264 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,267 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 20 treesize of output 9 [2021-06-12 19:55:02,268 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,271 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 21 treesize of output 7 [2021-06-12 19:55:02,272 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,275 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 11 treesize of output 3 [2021-06-12 19:55:02,275 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:02,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,285 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 12 treesize of output 5 [2021-06-12 19:55:02,286 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,289 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 44 treesize of output 19 [2021-06-12 19:55:02,289 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,292 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 12 treesize of output 5 [2021-06-12 19:55:02,293 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:02,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,304 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 21 treesize of output 7 [2021-06-12 19:55:02,305 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,307 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 [2021-06-12 19:55:02,308 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:02,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:02,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:02,374 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:55:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:02,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975374622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:02,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:02,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:02,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830451774] [2021-06-12 19:55:02,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:02,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:02,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:02,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:02,505 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) [2021-06-12 19:55:02,995 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 19:55:03,190 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:55:03,474 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:55:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:03,534 INFO L93 Difference]: Finished difference Result 250 states and 726 transitions. [2021-06-12 19:55:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:03,535 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 [2021-06-12 19:55:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:03,535 INFO L225 Difference]: With dead ends: 250 [2021-06-12 19:55:03,535 INFO L226 Difference]: Without dead ends: 242 [2021-06-12 19:55:03,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1095.5ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:03,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-06-12 19:55:03,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208. [2021-06-12 19:55:03,537 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) [2021-06-12 19:55:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 616 transitions. [2021-06-12 19:55:03,538 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 616 transitions. Word has length 17 [2021-06-12 19:55:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:03,538 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 616 transitions. [2021-06-12 19:55:03,538 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) [2021-06-12 19:55:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 616 transitions. [2021-06-12 19:55:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:03,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:03,538 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:03,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3150 [2021-06-12 19:55:03,739 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:03,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:03,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1276876152, now seen corresponding path program 79 times [2021-06-12 19:55:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:03,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426045288] [2021-06-12 19:55:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:04,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426045288] [2021-06-12 19:55:04,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426045288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806009282] [2021-06-12 19:55:04,041 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 [2021-06-12 19:55:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:04,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:04,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,294 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 15 treesize of output 11 [2021-06-12 19:55:04,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,298 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 25 treesize of output 19 [2021-06-12 19:55:04,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,372 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 [2021-06-12 19:55:04,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:04,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,378 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 [2021-06-12 19:55:04,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:04,454 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. [2021-06-12 19:55:04,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:190, output treesize:180 [2021-06-12 19:55:04,666 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-12 19:55:04,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,670 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 35 treesize of output 27 [2021-06-12 19:55:04,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,676 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 19 treesize of output 15 [2021-06-12 19:55:04,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,681 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 [2021-06-12 19:55:04,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:04,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,693 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 38 treesize of output 30 [2021-06-12 19:55:04,694 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:04,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,699 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 35 treesize of output 27 [2021-06-12 19:55:04,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:04,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,705 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 25 treesize of output 19 [2021-06-12 19:55:04,706 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,712 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 [2021-06-12 19:55:04,712 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,718 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 [2021-06-12 19:55:04,718 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:04,723 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 [2021-06-12 19:55:04,724 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,999 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2021-06-12 19:55:04,999 INFO L628 ElimStorePlain]: treesize reduction 278, result has 58.8 percent of original size [2021-06-12 19:55:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,007 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 24 treesize of output 9 [2021-06-12 19:55:05,007 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,012 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 12 treesize of output 5 [2021-06-12 19:55:05,013 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,026 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 21 treesize of output 7 [2021-06-12 19:55:05,026 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,031 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 21 treesize of output 7 [2021-06-12 19:55:05,031 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,044 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 20 treesize of output 9 [2021-06-12 19:55:05,045 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,049 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 20 treesize of output 9 [2021-06-12 19:55:05,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,062 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 21 treesize of output 7 [2021-06-12 19:55:05,063 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,067 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 11 treesize of output 3 [2021-06-12 19:55:05,068 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,081 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 46 treesize of output 15 [2021-06-12 19:55:05,082 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,085 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 24 treesize of output 9 [2021-06-12 19:55:05,086 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,201 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-12 19:55:05,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:05,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:05,205 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:509, output treesize:208 [2021-06-12 19:55:05,356 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-06-12 19:55:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:05,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806009282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:05,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:55:05,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935744551] [2021-06-12 19:55:05,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:05,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:05,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:05,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:05,443 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) [2021-06-12 19:55:05,826 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-06-12 19:55:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:05,905 INFO L93 Difference]: Finished difference Result 236 states and 693 transitions. [2021-06-12 19:55:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:05,906 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 17 [2021-06-12 19:55:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:05,906 INFO L225 Difference]: With dead ends: 236 [2021-06-12 19:55:05,906 INFO L226 Difference]: Without dead ends: 232 [2021-06-12 19:55:05,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-12 19:55:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 206. [2021-06-12 19:55:05,908 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) [2021-06-12 19:55:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 610 transitions. [2021-06-12 19:55:05,909 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 610 transitions. Word has length 17 [2021-06-12 19:55:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:05,909 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 610 transitions. [2021-06-12 19:55:05,909 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) [2021-06-12 19:55:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 610 transitions. [2021-06-12 19:55:05,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:05,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:05,909 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:06,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3168,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:06,110 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:06,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:06,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1996192008, now seen corresponding path program 80 times [2021-06-12 19:55:06,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:06,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515350303] [2021-06-12 19:55:06,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:06,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515350303] [2021-06-12 19:55:06,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515350303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:06,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961144912] [2021-06-12 19:55:06,304 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 [2021-06-12 19:55:06,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:06,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:06,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:06,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,418 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 35 treesize of output 27 [2021-06-12 19:55:06,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:06,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,423 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 15 treesize of output 11 [2021-06-12 19:55:06,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,426 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 [2021-06-12 19:55:06,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,429 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 25 treesize of output 19 [2021-06-12 19:55:06,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:06,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:06,482 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-12 19:55:06,591 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]} [2021-06-12 19:55:06,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:06,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:06,601 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 25 treesize of output 19 [2021-06-12 19:55:06,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,794 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 19:55:06,794 INFO L628 ElimStorePlain]: treesize reduction 197, result has 62.3 percent of original size [2021-06-12 19:55:06,797 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 [2021-06-12 19:55:06,799 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:06,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:06,891 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 7 treesize of output 5 [2021-06-12 19:55:06,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:06,984 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,988 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 19 treesize of output 15 [2021-06-12 19:55:06,988 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,992 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 [2021-06-12 19:55:06,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,997 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 48 treesize of output 38 [2021-06-12 19:55:06,998 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,001 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 30 treesize of output 24 [2021-06-12 19:55:07,002 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,006 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 [2021-06-12 19:55:07,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,138 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-12 19:55:07,138 INFO L628 ElimStorePlain]: treesize reduction 49, result has 82.9 percent of original size [2021-06-12 19:55:07,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,142 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 20 treesize of output 9 [2021-06-12 19:55:07,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,145 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 10 treesize of output 5 [2021-06-12 19:55:07,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,218 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 11 treesize of output 3 [2021-06-12 19:55:07,218 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,221 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 21 treesize of output 7 [2021-06-12 19:55:07,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,294 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:07,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,297 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 21 treesize of output 7 [2021-06-12 19:55:07,298 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,301 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 12 treesize of output 5 [2021-06-12 19:55:07,301 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,304 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 12 treesize of output 5 [2021-06-12 19:55:07,305 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,308 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 44 treesize of output 19 [2021-06-12 19:55:07,308 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,311 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 11 treesize of output 3 [2021-06-12 19:55:07,311 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:07,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:07,371 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:55:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:07,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961144912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:07,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:07,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:07,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372575161] [2021-06-12 19:55:07,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:07,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:07,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:07,507 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) [2021-06-12 19:55:07,924 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 19:55:08,151 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-12 19:55:08,341 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-12 19:55:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:08,539 INFO L93 Difference]: Finished difference Result 262 states and 749 transitions. [2021-06-12 19:55:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:55:08,540 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 [2021-06-12 19:55:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:08,540 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:55:08,540 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:55:08,540 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1119.5ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:55:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-06-12 19:55:08,543 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) [2021-06-12 19:55:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-12 19:55:08,544 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-12 19:55:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:08,544 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-12 19:55:08,544 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) [2021-06-12 19:55:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-12 19:55:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:08,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:08,545 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:08,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3216 [2021-06-12 19:55:08,757 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1653608496, now seen corresponding path program 81 times [2021-06-12 19:55:08,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:08,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173784041] [2021-06-12 19:55:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:08,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173784041] [2021-06-12 19:55:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173784041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009114225] [2021-06-12 19:55:08,886 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 [2021-06-12 19:55:08,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:08,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:09,014 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 15 treesize of output 11 [2021-06-12 19:55:09,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:09,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,071 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 25 treesize of output 19 [2021-06-12 19:55:09,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:09,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:09,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,131 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. [2021-06-12 19:55:09,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:196, output treesize:186 [2021-06-12 19:55:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,303 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 [2021-06-12 19:55:09,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,312 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 28 treesize of output 22 [2021-06-12 19:55:09,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,321 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 [2021-06-12 19:55:09,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,329 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 38 treesize of output 30 [2021-06-12 19:55:09,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:09,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,339 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 [2021-06-12 19:55:09,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,347 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 35 treesize of output 27 [2021-06-12 19:55:09,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:09,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,356 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 35 treesize of output 27 [2021-06-12 19:55:09,358 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,365 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 19 treesize of output 15 [2021-06-12 19:55:09,366 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,374 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 29 treesize of output 23 [2021-06-12 19:55:09,376 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:09,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,383 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 [2021-06-12 19:55:09,384 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,753 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 84 [2021-06-12 19:55:09,753 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.2 percent of original size [2021-06-12 19:55:09,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,760 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 20 treesize of output 9 [2021-06-12 19:55:09,761 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,767 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 20 treesize of output 9 [2021-06-12 19:55:09,768 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,785 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 24 treesize of output 9 [2021-06-12 19:55:09,785 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,792 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 46 treesize of output 15 [2021-06-12 19:55:09,793 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,815 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 21 treesize of output 7 [2021-06-12 19:55:09,816 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,822 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 21 treesize of output 7 [2021-06-12 19:55:09,823 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,837 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 21 treesize of output 7 [2021-06-12 19:55:09,837 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,842 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 11 treesize of output 3 [2021-06-12 19:55:09,843 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,847 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 12 treesize of output 5 [2021-06-12 19:55:09,848 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,851 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 24 treesize of output 9 [2021-06-12 19:55:09,852 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,964 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 19:55:09,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:09,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:09,968 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:525, output treesize:199 [2021-06-12 19:55:10,119 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-12 19:55:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:10,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009114225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:10,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:55:10,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314984621] [2021-06-12 19:55:10,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:10,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:10,205 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) [2021-06-12 19:55:10,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:10,579 INFO L93 Difference]: Finished difference Result 237 states and 696 transitions. [2021-06-12 19:55:10,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:10,579 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 [2021-06-12 19:55:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:10,580 INFO L225 Difference]: With dead ends: 237 [2021-06-12 19:55:10,580 INFO L226 Difference]: Without dead ends: 233 [2021-06-12 19:55:10,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:10,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-12 19:55:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2021-06-12 19:55:10,582 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) [2021-06-12 19:55:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-12 19:55:10,582 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-12 19:55:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:10,583 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-12 19:55:10,583 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) [2021-06-12 19:55:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-12 19:55:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:10,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:10,583 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:10,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:10,784 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:10,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:10,784 INFO L82 PathProgramCache]: Analyzing trace with hash -573434050, now seen corresponding path program 82 times [2021-06-12 19:55:10,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:10,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994553249] [2021-06-12 19:55:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:10,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:10,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994553249] [2021-06-12 19:55:10,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994553249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395276495] [2021-06-12 19:55:10,932 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 [2021-06-12 19:55:10,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:10,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:10,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:11,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,033 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 27 treesize of output 21 [2021-06-12 19:55:11,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,037 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 15 treesize of output 11 [2021-06-12 19:55:11,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,041 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 17 treesize of output 13 [2021-06-12 19:55:11,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,044 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 25 treesize of output 19 [2021-06-12 19:55:11,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:11,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:169, output treesize:159 [2021-06-12 19:55:11,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,261 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 27 treesize of output 21 [2021-06-12 19:55:11,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:11,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,267 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 29 treesize of output 23 [2021-06-12 19:55:11,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:11,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,273 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 35 treesize of output 27 [2021-06-12 19:55:11,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:11,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,280 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 38 treesize of output 30 [2021-06-12 19:55:11,281 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:11,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,286 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 25 treesize of output 19 [2021-06-12 19:55:11,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,516 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 70 [2021-06-12 19:55:11,517 INFO L628 ElimStorePlain]: treesize reduction 240, result has 59.0 percent of original size [2021-06-12 19:55:11,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,522 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 11 treesize of output 3 [2021-06-12 19:55:11,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,527 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 21 treesize of output 7 [2021-06-12 19:55:11,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,538 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 46 treesize of output 15 [2021-06-12 19:55:11,539 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,543 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 [2021-06-12 19:55:11,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,558 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 20 treesize of output 9 [2021-06-12 19:55:11,559 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,563 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 20 treesize of output 9 [2021-06-12 19:55:11,563 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,575 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 12 treesize of output 5 [2021-06-12 19:55:11,575 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,672 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 28 treesize of output 22 [2021-06-12 19:55:11,673 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:11,677 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,680 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 19 treesize of output 15 [2021-06-12 19:55:11,681 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,773 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 11 treesize of output 3 [2021-06-12 19:55:11,774 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,777 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 21 treesize of output 7 [2021-06-12 19:55:11,778 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:11,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:11,866 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:454, output treesize:171 [2021-06-12 19:55:12,054 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-12 19:55:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:12,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395276495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:12,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:12,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:55:12,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063432544] [2021-06-12 19:55:12,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:12,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:12,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:12,116 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) [2021-06-12 19:55:12,442 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-06-12 19:55:12,604 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-06-12 19:55:12,758 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-12 19:55:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:12,824 INFO L93 Difference]: Finished difference Result 250 states and 724 transitions. [2021-06-12 19:55:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:12,824 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 [2021-06-12 19:55:12,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:12,825 INFO L225 Difference]: With dead ends: 250 [2021-06-12 19:55:12,825 INFO L226 Difference]: Without dead ends: 246 [2021-06-12 19:55:12,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 930.1ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-12 19:55:12,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 205. [2021-06-12 19:55:12,827 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) [2021-06-12 19:55:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 607 transitions. [2021-06-12 19:55:12,827 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 607 transitions. Word has length 17 [2021-06-12 19:55:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:12,827 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 607 transitions. [2021-06-12 19:55:12,828 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) [2021-06-12 19:55:12,828 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 607 transitions. [2021-06-12 19:55:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:12,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:12,828 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:13,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:13,028 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:13,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:13,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1205884026, now seen corresponding path program 83 times [2021-06-12 19:55:13,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:13,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217203002] [2021-06-12 19:55:13,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:13,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217203002] [2021-06-12 19:55:13,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217203002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:13,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682005066] [2021-06-12 19:55:13,315 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 [2021-06-12 19:55:13,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:13,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:13,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:13,433 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 25 treesize of output 19 [2021-06-12 19:55:13,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,436 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 27 treesize of output 21 [2021-06-12 19:55:13,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:13,439 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 15 treesize of output 11 [2021-06-12 19:55:13,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,442 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 17 treesize of output 13 [2021-06-12 19:55:13,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:13,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:55:13,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,553 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 [2021-06-12 19:55:13,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,557 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 27 treesize of output 21 [2021-06-12 19:55:13,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:13,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,562 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 28 treesize of output 22 [2021-06-12 19:55:13,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:13,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,566 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 15 treesize of output 11 [2021-06-12 19:55:13,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,570 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 35 treesize of output 27 [2021-06-12 19:55:13,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:13,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,576 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 37 treesize of output 29 [2021-06-12 19:55:13,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:13,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:13,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,589 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 18 treesize of output 14 [2021-06-12 19:55:13,590 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,595 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 25 treesize of output 19 [2021-06-12 19:55:13,596 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,599 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 27 treesize of output 21 [2021-06-12 19:55:13,600 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,752 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 19:55:13,753 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-12 19:55:13,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,756 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 10 treesize of output 5 [2021-06-12 19:55:13,756 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,759 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 20 treesize of output 9 [2021-06-12 19:55:13,760 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,763 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 [2021-06-12 19:55:13,764 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,767 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 11 treesize of output 3 [2021-06-12 19:55:13,767 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,777 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 12 treesize of output 5 [2021-06-12 19:55:13,778 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,781 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 44 treesize of output 19 [2021-06-12 19:55:13,781 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,784 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 12 treesize of output 5 [2021-06-12 19:55:13,784 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,796 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 [2021-06-12 19:55:13,797 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,799 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 11 treesize of output 3 [2021-06-12 19:55:13,800 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:13,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:13,865 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:55:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:13,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682005066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:13,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:13,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:13,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132597459] [2021-06-12 19:55:13,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:13,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:13,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:13,996 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) [2021-06-12 19:55:14,563 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-12 19:55:14,741 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:55:15,015 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:55:15,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:15,067 INFO L93 Difference]: Finished difference Result 268 states and 778 transitions. [2021-06-12 19:55:15,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:15,068 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 [2021-06-12 19:55:15,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:15,068 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:55:15,069 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:55:15,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1199.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:15,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:55:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 209. [2021-06-12 19:55:15,072 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) [2021-06-12 19:55:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-12 19:55:15,072 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-12 19:55:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:15,072 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-12 19:55:15,072 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) [2021-06-12 19:55:15,073 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-12 19:55:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:15,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:15,073 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:15,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3305 [2021-06-12 19:55:15,289 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:15,289 INFO L82 PathProgramCache]: Analyzing trace with hash 391077872, now seen corresponding path program 84 times [2021-06-12 19:55:15,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:15,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331428456] [2021-06-12 19:55:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:15,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331428456] [2021-06-12 19:55:15,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331428456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:15,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408560872] [2021-06-12 19:55:15,533 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 [2021-06-12 19:55:15,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:15,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:15,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:15,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:15,648 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 27 treesize of output 21 [2021-06-12 19:55:15,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:15,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:15,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,655 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 25 treesize of output 19 [2021-06-12 19:55:15,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,658 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 17 treesize of output 13 [2021-06-12 19:55:15,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:15,701 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. [2021-06-12 19:55:15,701 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:147, output treesize:137 [2021-06-12 19:55:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,854 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 35 treesize of output 27 [2021-06-12 19:55:15,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,860 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 29 treesize of output 23 [2021-06-12 19:55:15,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:15,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,865 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 27 treesize of output 21 [2021-06-12 19:55:15,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,871 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 25 treesize of output 19 [2021-06-12 19:55:15,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,877 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 15 treesize of output 11 [2021-06-12 19:55:15,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,883 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 38 treesize of output 30 [2021-06-12 19:55:15,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,889 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 [2021-06-12 19:55:15,890 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,895 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 19 treesize of output 15 [2021-06-12 19:55:15,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:15,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,906 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 [2021-06-12 19:55:15,907 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,135 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-06-12 19:55:16,135 INFO L628 ElimStorePlain]: treesize reduction 142, result has 71.8 percent of original size [2021-06-12 19:55:16,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,140 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 21 treesize of output 7 [2021-06-12 19:55:16,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,145 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 20 treesize of output 9 [2021-06-12 19:55:16,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,150 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 [2021-06-12 19:55:16,150 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,162 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 9 treesize of output 3 [2021-06-12 19:55:16,162 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,167 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 46 treesize of output 15 [2021-06-12 19:55:16,167 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,172 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 24 treesize of output 9 [2021-06-12 19:55:16,172 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,189 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 11 treesize of output 3 [2021-06-12 19:55:16,189 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,193 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 21 treesize of output 7 [2021-06-12 19:55:16,194 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,205 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 11 treesize of output 3 [2021-06-12 19:55:16,206 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,210 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 24 treesize of output 9 [2021-06-12 19:55:16,211 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,214 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 12 treesize of output 5 [2021-06-12 19:55:16,215 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:16,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:16,320 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 6 variables, input treesize:407, output treesize:173 [2021-06-12 19:55:16,468 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-12 19:55:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:16,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408560872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:16,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:16,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:55:16,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393386110] [2021-06-12 19:55:16,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:16,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:16,526 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) [2021-06-12 19:55:16,978 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:55:17,169 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-12 19:55:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:17,231 INFO L93 Difference]: Finished difference Result 253 states and 742 transitions. [2021-06-12 19:55:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:17,231 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 [2021-06-12 19:55:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:17,232 INFO L225 Difference]: With dead ends: 253 [2021-06-12 19:55:17,232 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:55:17,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 933.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:55:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-06-12 19:55:17,235 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) [2021-06-12 19:55:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-06-12 19:55:17,235 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-06-12 19:55:17,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:17,235 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-06-12 19:55:17,235 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) [2021-06-12 19:55:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-06-12 19:55:17,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:17,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:17,236 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:17,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:17,453 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 981448970, now seen corresponding path program 85 times [2021-06-12 19:55:17,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:17,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448879619] [2021-06-12 19:55:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:17,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:17,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448879619] [2021-06-12 19:55:17,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448879619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:17,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525554411] [2021-06-12 19:55:17,624 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 [2021-06-12 19:55:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:17,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,769 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 27 treesize of output 21 [2021-06-12 19:55:17,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:17,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,773 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 [2021-06-12 19:55:17,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:17,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,817 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 [2021-06-12 19:55:17,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:17,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,820 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 17 treesize of output 13 [2021-06-12 19:55:17,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:17,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:17,861 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. [2021-06-12 19:55:17,861 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:143, output treesize:133 [2021-06-12 19:55:18,071 INFO L446 ElimStorePlain]: Different costs {1=[array_0], 10=[array_2]} [2021-06-12 19:55:18,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,075 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 25 treesize of output 19 [2021-06-12 19:55:18,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,080 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 25 treesize of output 19 [2021-06-12 19:55:18,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,085 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 [2021-06-12 19:55:18,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,089 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 29 treesize of output 23 [2021-06-12 19:55:18,090 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:18,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,095 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 27 treesize of output 21 [2021-06-12 19:55:18,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:18,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,100 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 [2021-06-12 19:55:18,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,105 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 [2021-06-12 19:55:18,107 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:18,111 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 17 treesize of output 13 [2021-06-12 19:55:18,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,309 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-06-12 19:55:18,309 INFO L628 ElimStorePlain]: treesize reduction 156, result has 63.8 percent of original size [2021-06-12 19:55:18,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,314 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 9 treesize of output 3 [2021-06-12 19:55:18,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,319 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 12 treesize of output 5 [2021-06-12 19:55:18,319 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,324 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 24 treesize of output 9 [2021-06-12 19:55:18,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:18,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,336 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 20 treesize of output 9 [2021-06-12 19:55:18,337 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,341 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 20 treesize of output 9 [2021-06-12 19:55:18,342 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,353 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 11 treesize of output 3 [2021-06-12 19:55:18,354 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,358 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 21 treesize of output 7 [2021-06-12 19:55:18,359 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,362 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 11 treesize of output 3 [2021-06-12 19:55:18,363 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:18,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:18,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:55:18,452 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:365, output treesize:135 [2021-06-12 19:55:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:18,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525554411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:18,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:55:18,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431227158] [2021-06-12 19:55:18,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:18,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:18,632 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) [2021-06-12 19:55:19,335 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 104 [2021-06-12 19:55:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:19,434 INFO L93 Difference]: Finished difference Result 293 states and 852 transitions. [2021-06-12 19:55:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:19,434 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 [2021-06-12 19:55:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:19,435 INFO L225 Difference]: With dead ends: 293 [2021-06-12 19:55:19,435 INFO L226 Difference]: Without dead ends: 289 [2021-06-12 19:55:19,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 955.7ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-12 19:55:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 205. [2021-06-12 19:55:19,437 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) [2021-06-12 19:55:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 607 transitions. [2021-06-12 19:55:19,437 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 607 transitions. Word has length 17 [2021-06-12 19:55:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:19,438 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 607 transitions. [2021-06-12 19:55:19,438 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) [2021-06-12 19:55:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 607 transitions. [2021-06-12 19:55:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:19,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:19,438 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:19,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:19,639 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:19,639 INFO L82 PathProgramCache]: Analyzing trace with hash 527178728, now seen corresponding path program 86 times [2021-06-12 19:55:19,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:19,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452123050] [2021-06-12 19:55:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:19,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452123050] [2021-06-12 19:55:19,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452123050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404597754] [2021-06-12 19:55:19,914 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 [2021-06-12 19:55:19,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:19,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:19,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:19,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:20,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,041 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 35 treesize of output 27 [2021-06-12 19:55:20,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:20,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,046 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 [2021-06-12 19:55:20,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,049 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 [2021-06-12 19:55:20,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:55:20,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:20,106 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-12 19:55:20,216 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_845, v_prenex_847, v_prenex_849, array_2], 1=[v_prenex_846, v_prenex_848, array_4, v_prenex_850]} [2021-06-12 19:55:20,220 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 27 treesize of output 21 [2021-06-12 19:55:20,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:20,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:20,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,415 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 19:55:20,416 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.5 percent of original size [2021-06-12 19:55:20,419 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 27 treesize of output 21 [2021-06-12 19:55:20,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:20,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,513 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 28 treesize of output 22 [2021-06-12 19:55:20,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,517 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 30 treesize of output 24 [2021-06-12 19:55:20,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,522 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 28 treesize of output 22 [2021-06-12 19:55:20,523 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:20,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,530 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 30 treesize of output 24 [2021-06-12 19:55:20,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,534 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 48 treesize of output 38 [2021-06-12 19:55:20,535 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,672 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 19:55:20,673 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.3 percent of original size [2021-06-12 19:55:20,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:20,677 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,747 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 20 treesize of output 9 [2021-06-12 19:55:20,748 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,751 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 10 treesize of output 5 [2021-06-12 19:55:20,751 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,825 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 11 treesize of output 3 [2021-06-12 19:55:20,826 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,829 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 [2021-06-12 19:55:20,829 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,905 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:20,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,908 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 12 treesize of output 5 [2021-06-12 19:55:20,908 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,911 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 21 treesize of output 7 [2021-06-12 19:55:20,912 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:20,915 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,918 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 44 treesize of output 19 [2021-06-12 19:55:20,919 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,921 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 21 treesize of output 7 [2021-06-12 19:55:20,922 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:20,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:20,981 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:55:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:21,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404597754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:21,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:21,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:21,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218945668] [2021-06-12 19:55:21,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:21,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:21,118 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) [2021-06-12 19:55:21,679 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 88 [2021-06-12 19:55:21,857 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-12 19:55:22,046 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-12 19:55:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:22,073 INFO L93 Difference]: Finished difference Result 262 states and 761 transitions. [2021-06-12 19:55:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:22,073 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 [2021-06-12 19:55:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:22,073 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:55:22,073 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:55:22,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1220.7ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:22,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:55:22,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-06-12 19:55:22,075 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) [2021-06-12 19:55:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 619 transitions. [2021-06-12 19:55:22,076 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 619 transitions. Word has length 17 [2021-06-12 19:55:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:22,076 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 619 transitions. [2021-06-12 19:55:22,076 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) [2021-06-12 19:55:22,076 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 619 transitions. [2021-06-12 19:55:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:22,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:22,076 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:22,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-06-12 19:55:22,281 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash 869762240, now seen corresponding path program 87 times [2021-06-12 19:55:22,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:22,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600720511] [2021-06-12 19:55:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:22,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:22,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600720511] [2021-06-12 19:55:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600720511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:22,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883198473] [2021-06-12 19:55:22,430 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 [2021-06-12 19:55:22,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:22,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:22,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:55:22,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:22,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:22,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:22,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:22,613 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 27 treesize of output 21 [2021-06-12 19:55:22,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:22,617 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 25 treesize of output 19 [2021-06-12 19:55:22,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:22,673 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. [2021-06-12 19:55:22,673 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:196, output treesize:186 [2021-06-12 19:55:22,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,845 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 [2021-06-12 19:55:22,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,851 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 [2021-06-12 19:55:22,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:22,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,869 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 [2021-06-12 19:55:22,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,875 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 [2021-06-12 19:55:22,876 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,881 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 [2021-06-12 19:55:22,882 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,887 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 35 treesize of output 27 [2021-06-12 19:55:22,888 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:22,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,894 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 15 treesize of output 11 [2021-06-12 19:55:22,894 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:22,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:22,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,920 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 29 treesize of output 23 [2021-06-12 19:55:22,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:23,206 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 83 [2021-06-12 19:55:23,206 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.2 percent of original size [2021-06-12 19:55:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,211 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 21 treesize of output 7 [2021-06-12 19:55:23,212 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,217 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 11 treesize of output 3 [2021-06-12 19:55:23,218 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,223 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 46 treesize of output 15 [2021-06-12 19:55:23,223 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,228 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 24 treesize of output 9 [2021-06-12 19:55:23,229 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,247 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 [2021-06-12 19:55:23,248 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,252 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 [2021-06-12 19:55:23,253 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,274 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 12 treesize of output 5 [2021-06-12 19:55:23,274 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,279 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 [2021-06-12 19:55:23,279 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,292 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 20 treesize of output 9 [2021-06-12 19:55:23,292 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,296 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 20 treesize of output 9 [2021-06-12 19:55:23,297 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,409 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-06-12 19:55:23,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:23,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:23,413 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 6 variables, input treesize:525, output treesize:199 [2021-06-12 19:55:23,562 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-06-12 19:55:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:23,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883198473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:23,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:23,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:55:23,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261812358] [2021-06-12 19:55:23,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:23,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:23,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:23,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:23,649 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) [2021-06-12 19:55:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:24,149 INFO L93 Difference]: Finished difference Result 252 states and 741 transitions. [2021-06-12 19:55:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:24,150 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 [2021-06-12 19:55:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:24,150 INFO L225 Difference]: With dead ends: 252 [2021-06-12 19:55:24,150 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:55:24,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:55:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2021-06-12 19:55:24,153 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) [2021-06-12 19:55:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-06-12 19:55:24,153 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-06-12 19:55:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:24,153 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-06-12 19:55:24,153 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) [2021-06-12 19:55:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-06-12 19:55:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:24,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:24,154 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:24,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:24,357 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1237021880, now seen corresponding path program 88 times [2021-06-12 19:55:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:24,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030481312] [2021-06-12 19:55:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:24,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030481312] [2021-06-12 19:55:24,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030481312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:24,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449120857] [2021-06-12 19:55:24,513 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 [2021-06-12 19:55:24,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:24,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:24,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:24,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,606 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 27 treesize of output 21 [2021-06-12 19:55:24,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:24,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,610 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 15 treesize of output 11 [2021-06-12 19:55:24,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,613 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 25 treesize of output 19 [2021-06-12 19:55:24,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:24,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:24,647 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:125, output treesize:115 [2021-06-12 19:55:24,781 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_856, v_prenex_858, array_2, v_prenex_860], 1=[v_prenex_855, v_prenex_857, array_0, v_prenex_859]} [2021-06-12 19:55:24,784 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 28 treesize of output 22 [2021-06-12 19:55:24,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,789 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 19 treesize of output 15 [2021-06-12 19:55:24,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,793 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 [2021-06-12 19:55:24,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:24,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:24,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:24,968 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 19:55:24,968 INFO L628 ElimStorePlain]: treesize reduction 82, result has 78.2 percent of original size [2021-06-12 19:55:24,971 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 7 treesize of output 5 [2021-06-12 19:55:24,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,113 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 19:55:25,113 INFO L628 ElimStorePlain]: treesize reduction 30, result has 89.6 percent of original size [2021-06-12 19:55:25,116 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 [2021-06-12 19:55:25,117 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:25,242 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-12 19:55:25,242 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.5 percent of original size [2021-06-12 19:55:25,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:25,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:25,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,313 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 11 treesize of output 3 [2021-06-12 19:55:25,314 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,317 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 7 [2021-06-12 19:55:25,318 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,321 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 12 treesize of output 5 [2021-06-12 19:55:25,322 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,325 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 44 treesize of output 19 [2021-06-12 19:55:25,325 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,328 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 [2021-06-12 19:55:25,328 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_857 vanished before elimination [2021-06-12 19:55:25,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,400 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 11 treesize of output 3 [2021-06-12 19:55:25,401 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,403 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 21 treesize of output 7 [2021-06-12 19:55:25,404 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,472 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 20 treesize of output 9 [2021-06-12 19:55:25,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,475 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 10 treesize of output 5 [2021-06-12 19:55:25,476 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:25,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:25,542 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 8 variables, input treesize:344, output treesize:140 [2021-06-12 19:55:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:25,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449120857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:25,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:25,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 19:55:25,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135943560] [2021-06-12 19:55:25,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:25,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:25,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:25,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:25,716 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) [2021-06-12 19:55:26,190 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-06-12 19:55:26,430 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2021-06-12 19:55:26,699 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-06-12 19:55:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:26,731 INFO L93 Difference]: Finished difference Result 299 states and 862 transitions. [2021-06-12 19:55:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:26,731 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 [2021-06-12 19:55:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:26,731 INFO L225 Difference]: With dead ends: 299 [2021-06-12 19:55:26,731 INFO L226 Difference]: Without dead ends: 291 [2021-06-12 19:55:26,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1142.0ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-06-12 19:55:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 207. [2021-06-12 19:55:26,734 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) [2021-06-12 19:55:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 613 transitions. [2021-06-12 19:55:26,734 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 613 transitions. Word has length 17 [2021-06-12 19:55:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:26,734 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 613 transitions. [2021-06-12 19:55:26,734 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) [2021-06-12 19:55:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 613 transitions. [2021-06-12 19:55:26,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:26,735 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:26,735 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:26,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3449 [2021-06-12 19:55:26,935 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash -176185004, now seen corresponding path program 89 times [2021-06-12 19:55:26,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:26,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886186814] [2021-06-12 19:55:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886186814] [2021-06-12 19:55:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886186814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:27,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140553322] [2021-06-12 19:55:27,149 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 [2021-06-12 19:55:27,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:27,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:55:27,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:27,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:27,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,366 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 35 treesize of output 27 [2021-06-12 19:55:27,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:27,371 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 25 treesize of output 19 [2021-06-12 19:55:27,372 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,496 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-12 19:55:27,496 INFO L628 ElimStorePlain]: treesize reduction 32, result has 88.6 percent of original size [2021-06-12 19:55:27,499 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 15 treesize of output 11 [2021-06-12 19:55:27,500 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:27,503 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,506 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 [2021-06-12 19:55:27,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,633 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-12 19:55:27,633 INFO L628 ElimStorePlain]: treesize reduction 76, result has 66.7 percent of original size [2021-06-12 19:55:27,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:27,634 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:218, output treesize:152 [2021-06-12 19:55:27,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,737 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 18 treesize of output 14 [2021-06-12 19:55:27,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,741 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 27 treesize of output 21 [2021-06-12 19:55:27,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,746 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 25 treesize of output 19 [2021-06-12 19:55:27,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,750 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 35 treesize of output 27 [2021-06-12 19:55:27,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:27,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,755 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 [2021-06-12 19:55:27,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:27,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,760 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 25 treesize of output 19 [2021-06-12 19:55:27,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,766 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 15 treesize of output 11 [2021-06-12 19:55:27,766 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,770 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 [2021-06-12 19:55:27,771 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,776 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 15 treesize of output 11 [2021-06-12 19:55:27,776 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,780 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 35 treesize of output 27 [2021-06-12 19:55:27,782 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:27,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,785 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 37 treesize of output 29 [2021-06-12 19:55:27,786 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:27,790 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 25 treesize of output 19 [2021-06-12 19:55:27,791 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,983 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2021-06-12 19:55:27,983 INFO L628 ElimStorePlain]: treesize reduction 380, result has 42.6 percent of original size [2021-06-12 19:55:27,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,986 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 44 treesize of output 19 [2021-06-12 19:55:27,987 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,990 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 12 treesize of output 5 [2021-06-12 19:55:27,991 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,003 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 10 treesize of output 5 [2021-06-12 19:55:28,004 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,007 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 20 treesize of output 9 [2021-06-12 19:55:28,008 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,011 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 21 treesize of output 7 [2021-06-12 19:55:28,011 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,014 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 11 treesize of output 3 [2021-06-12 19:55:28,015 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,025 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 21 treesize of output 7 [2021-06-12 19:55:28,025 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,028 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 11 treesize of output 3 [2021-06-12 19:55:28,029 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:28,039 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:28,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:28,109 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 2 variables, input treesize:507, output treesize:183 [2021-06-12 19:55:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:28,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140553322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:28,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:28,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:55:28,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830941135] [2021-06-12 19:55:28,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:28,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:28,284 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) [2021-06-12 19:55:28,867 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2021-06-12 19:55:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,949 INFO L93 Difference]: Finished difference Result 282 states and 800 transitions. [2021-06-12 19:55:28,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:55:28,949 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 [2021-06-12 19:55:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,949 INFO L225 Difference]: With dead ends: 282 [2021-06-12 19:55:28,949 INFO L226 Difference]: Without dead ends: 270 [2021-06-12 19:55:28,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 979.8ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:55:28,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-12 19:55:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 219. [2021-06-12 19:55:28,952 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) [2021-06-12 19:55:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:55:28,952 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:55:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,952 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:55:28,952 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) [2021-06-12 19:55:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:55:28,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:28,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,953 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:29,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3476,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:29,153 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1305052866, now seen corresponding path program 90 times [2021-06-12 19:55:29,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:29,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909759273] [2021-06-12 19:55:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:29,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909759273] [2021-06-12 19:55:29,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909759273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663746535] [2021-06-12 19:55:29,319 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 [2021-06-12 19:55:29,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:29,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:29,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:29,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:29,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:29,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,499 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 27 treesize of output 21 [2021-06-12 19:55:29,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:29,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:29,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,506 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 [2021-06-12 19:55:29,507 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,509 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 17 treesize of output 13 [2021-06-12 19:55:29,510 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,577 INFO L628 ElimStorePlain]: treesize reduction 23, result has 85.4 percent of original size [2021-06-12 19:55:29,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:29,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:181, output treesize:134 [2021-06-12 19:55:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:29,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:29,786 INFO L628 ElimStorePlain]: treesize reduction 66, result has 66.7 percent of original size [2021-06-12 19:55:29,786 INFO L518 ElimStorePlain]: Eliminatee v_prenex_867 vanished before elimination [2021-06-12 19:55:29,789 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 30 treesize of output 24 [2021-06-12 19:55:29,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,793 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 21 treesize of output 17 [2021-06-12 19:55:29,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:29,817 INFO L518 ElimStorePlain]: Eliminatee v_prenex_869 vanished before elimination [2021-06-12 19:55:29,819 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 19 treesize of output 15 [2021-06-12 19:55:29,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,852 INFO L628 ElimStorePlain]: treesize reduction 13, result has 83.8 percent of original size [2021-06-12 19:55:29,852 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:29,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:29,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,857 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 19 treesize of output 15 [2021-06-12 19:55:29,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,877 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:55:29,878 INFO L518 ElimStorePlain]: Eliminatee v_prenex_863 vanished before elimination [2021-06-12 19:55:29,878 INFO L518 ElimStorePlain]: Eliminatee v_prenex_864 vanished before elimination [2021-06-12 19:55:29,878 INFO L518 ElimStorePlain]: Eliminatee v_prenex_865 vanished before elimination [2021-06-12 19:55:29,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:29,878 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:207, output treesize:26 [2021-06-12 19:55:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663746535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:29,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:55:29,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794286823] [2021-06-12 19:55:29,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:55:29,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:29,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:55:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:55:29,912 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) [2021-06-12 19:55:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:30,359 INFO L93 Difference]: Finished difference Result 268 states and 771 transitions. [2021-06-12 19:55:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:30,359 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 [2021-06-12 19:55:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:30,360 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:55:30,360 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 19:55:30,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 586.6ms TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 19:55:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 219. [2021-06-12 19:55:30,362 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) [2021-06-12 19:55:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:55:30,363 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:55:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:30,363 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:55:30,363 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) [2021-06-12 19:55:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:55:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:30,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:30,364 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:30,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3501 [2021-06-12 19:55:30,564 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash 733598060, now seen corresponding path program 91 times [2021-06-12 19:55:30,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:30,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699075324] [2021-06-12 19:55:30,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:30,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:30,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699075324] [2021-06-12 19:55:30,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699075324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:30,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910578290] [2021-06-12 19:55:30,752 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 [2021-06-12 19:55:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:30,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,881 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 [2021-06-12 19:55:30,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,885 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 15 treesize of output 11 [2021-06-12 19:55:30,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,888 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 25 treesize of output 19 [2021-06-12 19:55:30,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,892 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 35 treesize of output 27 [2021-06-12 19:55:30,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:30,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:30,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:30,962 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-06-12 19:55:31,162 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-12 19:55:31,166 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 30 treesize of output 24 [2021-06-12 19:55:31,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:31,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,177 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 30 treesize of output 24 [2021-06-12 19:55:31,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,183 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 30 treesize of output 24 [2021-06-12 19:55:31,184 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:31,189 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,194 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 17 treesize of output 13 [2021-06-12 19:55:31,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,200 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 [2021-06-12 19:55:31,201 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:31,205 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 46 treesize of output 36 [2021-06-12 19:55:31,206 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:31,211 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,216 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 25 treesize of output 19 [2021-06-12 19:55:31,216 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:31,222 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:31,227 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,231 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 [2021-06-12 19:55:31,232 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:31,237 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 48 treesize of output 38 [2021-06-12 19:55:31,238 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,382 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-12 19:55:31,382 INFO L628 ElimStorePlain]: treesize reduction 187, result has 56.0 percent of original size [2021-06-12 19:55:31,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,386 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 12 treesize of output 5 [2021-06-12 19:55:31,386 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,389 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 11 treesize of output 3 [2021-06-12 19:55:31,390 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,393 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 12 treesize of output 5 [2021-06-12 19:55:31,393 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,396 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 21 treesize of output 7 [2021-06-12 19:55:31,397 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,400 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 11 treesize of output 3 [2021-06-12 19:55:31,400 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,410 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 21 treesize of output 7 [2021-06-12 19:55:31,410 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,413 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 10 treesize of output 5 [2021-06-12 19:55:31,414 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,417 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 20 treesize of output 9 [2021-06-12 19:55:31,417 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,427 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 44 treesize of output 19 [2021-06-12 19:55:31,427 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:31,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:31,487 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:521, output treesize:139 [2021-06-12 19:55:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:31,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910578290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:31,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:55:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551142310] [2021-06-12 19:55:31,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:31,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:31,626 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) [2021-06-12 19:55:32,022 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-12 19:55:32,209 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-12 19:55:32,446 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 19:55:32,713 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-06-12 19:55:32,971 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2021-06-12 19:55:33,236 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 78 [2021-06-12 19:55:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:33,285 INFO L93 Difference]: Finished difference Result 380 states and 1054 transitions. [2021-06-12 19:55:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:55:33,286 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 [2021-06-12 19:55:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:33,286 INFO L225 Difference]: With dead ends: 380 [2021-06-12 19:55:33,286 INFO L226 Difference]: Without dead ends: 368 [2021-06-12 19:55:33,287 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1771.4ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-12 19:55:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 225. [2021-06-12 19:55:33,289 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) [2021-06-12 19:55:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 672 transitions. [2021-06-12 19:55:33,290 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 672 transitions. Word has length 17 [2021-06-12 19:55:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:33,290 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 672 transitions. [2021-06-12 19:55:33,290 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) [2021-06-12 19:55:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 672 transitions. [2021-06-12 19:55:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:33,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:33,290 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:33,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:33,491 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:33,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:33,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1233515728, now seen corresponding path program 92 times [2021-06-12 19:55:33,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:33,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508502817] [2021-06-12 19:55:33,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:33,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508502817] [2021-06-12 19:55:33,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508502817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033793815] [2021-06-12 19:55:33,743 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 [2021-06-12 19:55:33,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:33,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:33,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:34,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,163 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 [2021-06-12 19:55:34,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,168 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 15 treesize of output 11 [2021-06-12 19:55:34,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,294 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-06-12 19:55:34,294 INFO L628 ElimStorePlain]: treesize reduction 43, result has 81.9 percent of original size [2021-06-12 19:55:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,299 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 [2021-06-12 19:55:34,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,303 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 27 treesize of output 21 [2021-06-12 19:55:34,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:34,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,365 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 17 treesize of output 13 [2021-06-12 19:55:34,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,369 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 15 treesize of output 11 [2021-06-12 19:55:34,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,430 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. [2021-06-12 19:55:34,430 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:251, output treesize:182 [2021-06-12 19:55:34,658 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 6=[array_0]} [2021-06-12 19:55:34,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,662 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 19 treesize of output 15 [2021-06-12 19:55:34,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,667 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 20 treesize of output 16 [2021-06-12 19:55:34,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,671 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 [2021-06-12 19:55:34,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,676 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 18 treesize of output 14 [2021-06-12 19:55:34,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,681 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 27 treesize of output 21 [2021-06-12 19:55:34,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,686 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 [2021-06-12 19:55:34,687 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,691 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 [2021-06-12 19:55:34,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,695 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 29 treesize of output 23 [2021-06-12 19:55:34,696 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,838 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-12 19:55:34,839 INFO L628 ElimStorePlain]: treesize reduction 32, result has 87.9 percent of original size [2021-06-12 19:55:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,843 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 10 treesize of output 5 [2021-06-12 19:55:34,843 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,847 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 9 treesize of output 3 [2021-06-12 19:55:34,848 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,851 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 [2021-06-12 19:55:34,852 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,856 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 [2021-06-12 19:55:34,856 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,860 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 [2021-06-12 19:55:34,861 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,864 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 21 treesize of output 7 [2021-06-12 19:55:34,865 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,875 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 11 treesize of output 3 [2021-06-12 19:55:34,876 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,879 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 24 treesize of output 9 [2021-06-12 19:55:34,879 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:34,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:34,949 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:301, output treesize:57 [2021-06-12 19:55:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033793815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:34,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 19:55:34,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743610181] [2021-06-12 19:55:34,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:34,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:34,990 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) [2021-06-12 19:55:35,353 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2021-06-12 19:55:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:35,532 INFO L93 Difference]: Finished difference Result 278 states and 806 transitions. [2021-06-12 19:55:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:35,533 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 [2021-06-12 19:55:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:35,533 INFO L225 Difference]: With dead ends: 278 [2021-06-12 19:55:35,533 INFO L226 Difference]: Without dead ends: 274 [2021-06-12 19:55:35,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-12 19:55:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 228. [2021-06-12 19:55:35,536 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) [2021-06-12 19:55:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 681 transitions. [2021-06-12 19:55:35,536 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 681 transitions. Word has length 17 [2021-06-12 19:55:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:35,536 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 681 transitions. [2021-06-12 19:55:35,536 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) [2021-06-12 19:55:35,536 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 681 transitions. [2021-06-12 19:55:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:35,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:35,537 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:35,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3559 [2021-06-12 19:55:35,737 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:35,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:35,737 INFO L82 PathProgramCache]: Analyzing trace with hash 247722142, now seen corresponding path program 93 times [2021-06-12 19:55:35,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:35,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141834122] [2021-06-12 19:55:35,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:36,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141834122] [2021-06-12 19:55:36,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141834122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276810002] [2021-06-12 19:55:36,073 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 [2021-06-12 19:55:36,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:36,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:36,275 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 15 treesize of output 11 [2021-06-12 19:55:36,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,278 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 15 treesize of output 11 [2021-06-12 19:55:36,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:36,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:36,285 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 25 treesize of output 19 [2021-06-12 19:55:36,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,288 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 17 treesize of output 13 [2021-06-12 19:55:36,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:36,292 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,346 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-12 19:55:36,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:36,347 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-12 19:55:36,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:36,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:36,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:36,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,485 INFO L628 ElimStorePlain]: treesize reduction 71, result has 53.9 percent of original size [2021-06-12 19:55:36,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_879 vanished before elimination [2021-06-12 19:55:36,485 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:36,485 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:36,488 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 28 treesize of output 22 [2021-06-12 19:55:36,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:36,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:36,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,515 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:55:36,515 INFO L518 ElimStorePlain]: Eliminatee v_prenex_881 vanished before elimination [2021-06-12 19:55:36,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:36,515 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-12 19:55:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276810002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:36,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 19:55:36,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706698617] [2021-06-12 19:55:36,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:36,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:36,555 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) [2021-06-12 19:55:37,132 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-06-12 19:55:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:37,173 INFO L93 Difference]: Finished difference Result 278 states and 807 transitions. [2021-06-12 19:55:37,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:37,173 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 [2021-06-12 19:55:37,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:37,174 INFO L225 Difference]: With dead ends: 278 [2021-06-12 19:55:37,174 INFO L226 Difference]: Without dead ends: 274 [2021-06-12 19:55:37,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:55:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-06-12 19:55:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 226. [2021-06-12 19:55:37,176 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) [2021-06-12 19:55:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-06-12 19:55:37,176 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-06-12 19:55:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:37,176 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-06-12 19:55:37,177 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) [2021-06-12 19:55:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-06-12 19:55:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:37,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:37,177 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:37,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3615 [2021-06-12 19:55:37,381 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -297453036, now seen corresponding path program 94 times [2021-06-12 19:55:37,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:37,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020930697] [2021-06-12 19:55:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:37,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020930697] [2021-06-12 19:55:37,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020930697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407431347] [2021-06-12 19:55:37,632 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 [2021-06-12 19:55:37,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:37,753 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 [2021-06-12 19:55:37,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,757 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 27 treesize of output 21 [2021-06-12 19:55:37,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:37,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:37,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,763 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 17 treesize of output 13 [2021-06-12 19:55:37,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:37,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:37,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:55:37,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,875 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 27 treesize of output 21 [2021-06-12 19:55:37,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,879 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 17 treesize of output 13 [2021-06-12 19:55:37,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,883 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 27 treesize of output 21 [2021-06-12 19:55:37,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,887 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 28 treesize of output 22 [2021-06-12 19:55:37,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,892 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 18 treesize of output 14 [2021-06-12 19:55:37,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,895 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 35 treesize of output 27 [2021-06-12 19:55:37,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:37,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:37,901 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:37,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,905 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 25 treesize of output 19 [2021-06-12 19:55:37,905 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,909 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 25 treesize of output 19 [2021-06-12 19:55:37,909 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,913 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 [2021-06-12 19:55:37,913 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,064 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 19:55:38,065 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-12 19:55:38,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,068 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 10 treesize of output 5 [2021-06-12 19:55:38,069 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,072 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 20 treesize of output 9 [2021-06-12 19:55:38,073 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,075 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 21 treesize of output 7 [2021-06-12 19:55:38,076 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,079 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 11 treesize of output 3 [2021-06-12 19:55:38,080 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:38,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,090 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 12 treesize of output 5 [2021-06-12 19:55:38,090 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,093 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 44 treesize of output 19 [2021-06-12 19:55:38,094 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,097 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 12 treesize of output 5 [2021-06-12 19:55:38,097 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,109 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 [2021-06-12 19:55:38,110 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,112 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 [2021-06-12 19:55:38,113 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:38,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:38,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:38,179 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:55:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:38,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407431347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:38,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:38,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938122147] [2021-06-12 19:55:38,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:38,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:38,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:38,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:38,306 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) [2021-06-12 19:55:38,760 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-06-12 19:55:39,002 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2021-06-12 19:55:39,178 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:55:39,433 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:55:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:39,472 INFO L93 Difference]: Finished difference Result 308 states and 887 transitions. [2021-06-12 19:55:39,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:39,472 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 [2021-06-12 19:55:39,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:39,472 INFO L225 Difference]: With dead ends: 308 [2021-06-12 19:55:39,472 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 19:55:39,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1315.9ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 19:55:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 226. [2021-06-12 19:55:39,475 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) [2021-06-12 19:55:39,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-06-12 19:55:39,475 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-06-12 19:55:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:39,475 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-06-12 19:55:39,475 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) [2021-06-12 19:55:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-06-12 19:55:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:39,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:39,476 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:39,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-12 19:55:39,676 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:39,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2016424066, now seen corresponding path program 95 times [2021-06-12 19:55:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:39,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476051102] [2021-06-12 19:55:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:39,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:39,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476051102] [2021-06-12 19:55:39,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476051102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283450114] [2021-06-12 19:55:39,945 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 [2021-06-12 19:55:39,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:39,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:40,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,069 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 35 treesize of output 27 [2021-06-12 19:55:40,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:40,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,074 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 [2021-06-12 19:55:40,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,078 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 15 treesize of output 11 [2021-06-12 19:55:40,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,081 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 [2021-06-12 19:55:40,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:40,135 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:151, output treesize:211 [2021-06-12 19:55:40,242 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_882, v_prenex_884, v_prenex_886], 1=[array_4, v_prenex_883, v_prenex_885, v_prenex_887]} [2021-06-12 19:55:40,246 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 17 treesize of output 13 [2021-06-12 19:55:40,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:40,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,439 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-12 19:55:40,440 INFO L628 ElimStorePlain]: treesize reduction 191, result has 62.3 percent of original size [2021-06-12 19:55:40,443 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 27 treesize of output 21 [2021-06-12 19:55:40,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:40,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,532 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 27 treesize of output 21 [2021-06-12 19:55:40,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:40,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,626 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 30 treesize of output 24 [2021-06-12 19:55:40,627 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,631 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 28 treesize of output 22 [2021-06-12 19:55:40,632 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,635 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 28 treesize of output 22 [2021-06-12 19:55:40,636 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,639 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 48 treesize of output 38 [2021-06-12 19:55:40,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,644 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 30 treesize of output 24 [2021-06-12 19:55:40,645 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:40,648 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,784 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 19:55:40,784 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.1 percent of original size [2021-06-12 19:55:40,785 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:40,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,788 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 20 treesize of output 9 [2021-06-12 19:55:40,789 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:40,792 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,867 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 21 treesize of output 7 [2021-06-12 19:55:40,867 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,870 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 11 treesize of output 3 [2021-06-12 19:55:40,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,945 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 12 treesize of output 5 [2021-06-12 19:55:40,946 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,949 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 [2021-06-12 19:55:40,949 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,952 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 21 treesize of output 7 [2021-06-12 19:55:40,953 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,956 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 12 treesize of output 5 [2021-06-12 19:55:40,956 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:55:40,959 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:41,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:41,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:41,019 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:55:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:41,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283450114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:41,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:41,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803519834] [2021-06-12 19:55:41,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:41,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:41,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:41,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:41,160 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) [2021-06-12 19:55:41,641 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-12 19:55:41,831 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 19:55:42,005 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-12 19:55:42,308 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-06-12 19:55:42,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:42,367 INFO L93 Difference]: Finished difference Result 316 states and 900 transitions. [2021-06-12 19:55:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:55:42,367 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 [2021-06-12 19:55:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:42,367 INFO L225 Difference]: With dead ends: 316 [2021-06-12 19:55:42,367 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:55:42,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1329.1ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:55:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 225. [2021-06-12 19:55:42,371 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) [2021-06-12 19:55:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 672 transitions. [2021-06-12 19:55:42,371 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 672 transitions. Word has length 17 [2021-06-12 19:55:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:42,371 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 672 transitions. [2021-06-12 19:55:42,371 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) [2021-06-12 19:55:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 672 transitions. [2021-06-12 19:55:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:42,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:42,372 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:42,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:42,581 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:42,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1942193160, now seen corresponding path program 96 times [2021-06-12 19:55:42,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:42,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815861634] [2021-06-12 19:55:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815861634] [2021-06-12 19:55:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815861634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276864895] [2021-06-12 19:55:42,766 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 [2021-06-12 19:55:42,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:55:42,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:55:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:42,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:55:42,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,904 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 [2021-06-12 19:55:42,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,908 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 17 treesize of output 13 [2021-06-12 19:55:42,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,911 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 27 treesize of output 21 [2021-06-12 19:55:42,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:42,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:42,973 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. [2021-06-12 19:55:42,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:203, output treesize:193 [2021-06-12 19:55:43,465 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 104 [2021-06-12 19:55:43,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:55:43,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:43,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,923 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 17 treesize of output 13 [2021-06-12 19:55:43,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,163 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 117 [2021-06-12 19:55:44,163 INFO L628 ElimStorePlain]: treesize reduction 195, result has 59.9 percent of original size [2021-06-12 19:55:44,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,169 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 27 treesize of output 21 [2021-06-12 19:55:44,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:44,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,270 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 [2021-06-12 19:55:44,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,276 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 20 treesize of output 9 [2021-06-12 19:55:44,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,383 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 7 treesize of output 5 [2021-06-12 19:55:44,384 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_914 vanished before elimination [2021-06-12 19:55:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,484 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 19 treesize of output 15 [2021-06-12 19:55:44,485 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,490 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 17 [2021-06-12 19:55:44,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,580 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 [2021-06-12 19:55:44,580 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,668 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 11 treesize of output 3 [2021-06-12 19:55:44,668 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,673 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 12 treesize of output 5 [2021-06-12 19:55:44,674 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,755 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-12 19:55:44,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,761 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 28 treesize of output 22 [2021-06-12 19:55:44,762 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,766 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 30 treesize of output 24 [2021-06-12 19:55:44,767 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,848 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 24 treesize of output 9 [2021-06-12 19:55:44,848 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,853 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 21 treesize of output 7 [2021-06-12 19:55:44,853 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:44,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,932 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 11 treesize of output 3 [2021-06-12 19:55:44,932 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:45,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:55:45,009 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:482, output treesize:66 [2021-06-12 19:55:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276864895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:45,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:55:45,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94357678] [2021-06-12 19:55:45,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:45,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:45,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:45,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:45,059 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) [2021-06-12 19:55:45,608 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 141 [2021-06-12 19:55:46,075 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 176 [2021-06-12 19:55:46,361 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 151 [2021-06-12 19:55:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:46,429 INFO L93 Difference]: Finished difference Result 347 states and 980 transitions. [2021-06-12 19:55:46,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:46,429 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 [2021-06-12 19:55:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:46,430 INFO L225 Difference]: With dead ends: 347 [2021-06-12 19:55:46,430 INFO L226 Difference]: Without dead ends: 343 [2021-06-12 19:55:46,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1666.9ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-12 19:55:46,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 224. [2021-06-12 19:55:46,432 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) [2021-06-12 19:55:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 668 transitions. [2021-06-12 19:55:46,433 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 668 transitions. Word has length 17 [2021-06-12 19:55:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:46,433 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 668 transitions. [2021-06-12 19:55:46,433 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) [2021-06-12 19:55:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 668 transitions. [2021-06-12 19:55:46,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:46,433 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:46,433 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:46,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3672 [2021-06-12 19:55:46,634 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:46,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:46,634 INFO L82 PathProgramCache]: Analyzing trace with hash 933193372, now seen corresponding path program 97 times [2021-06-12 19:55:46,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:46,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325849913] [2021-06-12 19:55:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:46,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325849913] [2021-06-12 19:55:46,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325849913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780437152] [2021-06-12 19:55:46,902 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 [2021-06-12 19:55:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,066 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 27 treesize of output 21 [2021-06-12 19:55:47,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:47,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,071 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 15 treesize of output 11 [2021-06-12 19:55:47,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,076 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 25 treesize of output 19 [2021-06-12 19:55:47,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,080 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 [2021-06-12 19:55:47,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:47,147 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. [2021-06-12 19:55:47,147 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:183, output treesize:173 [2021-06-12 19:55:47,598 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 106 [2021-06-12 19:55:47,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,833 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 27 treesize of output 21 [2021-06-12 19:55:47,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:47,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,841 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 17 treesize of output 13 [2021-06-12 19:55:47,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,109 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 82 [2021-06-12 19:55:48,110 INFO L628 ElimStorePlain]: treesize reduction 222, result has 49.9 percent of original size [2021-06-12 19:55:48,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,114 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 11 treesize of output 3 [2021-06-12 19:55:48,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_935 vanished before elimination [2021-06-12 19:55:48,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_936 vanished before elimination [2021-06-12 19:55:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,187 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 30 treesize of output 24 [2021-06-12 19:55:48,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,192 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 28 treesize of output 22 [2021-06-12 19:55:48,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,309 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-06-12 19:55:48,310 INFO L628 ElimStorePlain]: treesize reduction 11, result has 94.5 percent of original size [2021-06-12 19:55:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,315 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 21 treesize of output 17 [2021-06-12 19:55:48,315 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,320 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 19 treesize of output 15 [2021-06-12 19:55:48,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,433 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 19:55:48,434 INFO L628 ElimStorePlain]: treesize reduction 30, result has 82.8 percent of original size [2021-06-12 19:55:48,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,439 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 11 treesize of output 3 [2021-06-12 19:55:48,440 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,496 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 21 treesize of output 7 [2021-06-12 19:55:48,497 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,501 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 12 treesize of output 5 [2021-06-12 19:55:48,502 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_939 vanished before elimination [2021-06-12 19:55:48,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_940 vanished before elimination [2021-06-12 19:55:48,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:48,561 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:48,610 INFO L518 ElimStorePlain]: Eliminatee v_prenex_942 vanished before elimination [2021-06-12 19:55:48,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:55:48,613 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 24 variables, input treesize:439, output treesize:31 [2021-06-12 19:55:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:48,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780437152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:48,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:48,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:55:48,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799919680] [2021-06-12 19:55:48,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:48,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:48,669 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) [2021-06-12 19:55:49,225 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2021-06-12 19:55:49,713 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 145 [2021-06-12 19:55:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:49,910 INFO L93 Difference]: Finished difference Result 320 states and 915 transitions. [2021-06-12 19:55:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:49,910 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 [2021-06-12 19:55:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:49,911 INFO L225 Difference]: With dead ends: 320 [2021-06-12 19:55:49,911 INFO L226 Difference]: Without dead ends: 316 [2021-06-12 19:55:49,911 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1580.8ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-12 19:55:49,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 223. [2021-06-12 19:55:49,913 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) [2021-06-12 19:55:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 664 transitions. [2021-06-12 19:55:49,914 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 664 transitions. Word has length 17 [2021-06-12 19:55:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:49,914 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 664 transitions. [2021-06-12 19:55:49,914 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) [2021-06-12 19:55:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 664 transitions. [2021-06-12 19:55:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:49,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:49,914 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:50,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-12 19:55:50,115 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash 267189852, now seen corresponding path program 98 times [2021-06-12 19:55:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:50,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358256620] [2021-06-12 19:55:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:50,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:50,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358256620] [2021-06-12 19:55:50,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358256620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:50,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769032478] [2021-06-12 19:55:50,351 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 [2021-06-12 19:55:50,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:50,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,438 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 [2021-06-12 19:55:50,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,441 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 35 treesize of output 27 [2021-06-12 19:55:50,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:50,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,446 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 [2021-06-12 19:55:50,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:50,450 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 25 treesize of output 19 [2021-06-12 19:55:50,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:50,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:50,506 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:213 [2021-06-12 19:55:50,838 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_954, array_2, v_prenex_948, v_prenex_950, v_prenex_952], 1=[v_prenex_955, v_prenex_949, array_4, v_prenex_951, v_prenex_953]} [2021-06-12 19:55:50,843 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 28 treesize of output 22 [2021-06-12 19:55:50,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:50,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,960 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2021-06-12 19:55:50,960 INFO L628 ElimStorePlain]: treesize reduction 122, result has 59.3 percent of original size [2021-06-12 19:55:50,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:50,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:50,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:50,970 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:51,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:51,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,060 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 27 treesize of output 21 [2021-06-12 19:55:51,061 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:51,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:51,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,162 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 12 treesize of output 5 [2021-06-12 19:55:51,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,212 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 21 treesize of output 7 [2021-06-12 19:55:51,213 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,216 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 11 treesize of output 3 [2021-06-12 19:55:51,217 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,272 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 [2021-06-12 19:55:51,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,276 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 24 treesize of output 9 [2021-06-12 19:55:51,276 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,322 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 10 treesize of output 5 [2021-06-12 19:55:51,323 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,326 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 20 treesize of output 9 [2021-06-12 19:55:51,326 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:51,374 INFO L518 ElimStorePlain]: Eliminatee v_prenex_953 vanished before elimination [2021-06-12 19:55:51,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:51,377 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:63 [2021-06-12 19:55:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769032478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:51,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:55:51,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789353534] [2021-06-12 19:55:51,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:55:51,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:51,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:55:51,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:55:51,434 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) [2021-06-12 19:55:51,835 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 19:55:52,094 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 19:55:52,389 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 62 [2021-06-12 19:55:52,661 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 19:55:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:52,696 INFO L93 Difference]: Finished difference Result 317 states and 906 transitions. [2021-06-12 19:55:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:55:52,696 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 [2021-06-12 19:55:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:52,696 INFO L225 Difference]: With dead ends: 317 [2021-06-12 19:55:52,697 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 19:55:52,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1487.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 19:55:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-06-12 19:55:52,699 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) [2021-06-12 19:55:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 659 transitions. [2021-06-12 19:55:52,699 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 659 transitions. Word has length 17 [2021-06-12 19:55:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:52,699 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 659 transitions. [2021-06-12 19:55:52,699 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) [2021-06-12 19:55:52,699 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 659 transitions. [2021-06-12 19:55:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:52,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:52,700 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:52,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3818 [2021-06-12 19:55:52,900 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:52,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1878980908, now seen corresponding path program 99 times [2021-06-12 19:55:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:52,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241351509] [2021-06-12 19:55:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241351509] [2021-06-12 19:55:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241351509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497861918] [2021-06-12 19:55:53,088 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 [2021-06-12 19:55:53,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:53,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:53,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,180 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 [2021-06-12 19:55:53,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,183 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 15 treesize of output 11 [2021-06-12 19:55:53,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,186 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 [2021-06-12 19:55:53,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,189 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 35 treesize of output 27 [2021-06-12 19:55:53,190 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:53,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:53,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:53,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-06-12 19:55:53,384 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 21 treesize of output 17 [2021-06-12 19:55:53,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,386 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 [2021-06-12 19:55:53,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:53,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:53,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,393 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 27 treesize of output 21 [2021-06-12 19:55:53,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:53,412 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:55:53,413 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:55:53,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:55:53,413 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:104, output treesize:26 [2021-06-12 19:55:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497861918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:53,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:55:53,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260360181] [2021-06-12 19:55:53,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:53,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:53,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:53,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:53,447 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) [2021-06-12 19:55:53,792 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-12 19:55:53,990 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 19:55:54,131 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 19:55:54,314 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-12 19:55:54,491 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-12 19:55:54,668 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 19:55:54,851 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-12 19:55:55,063 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-12 19:55:55,238 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-06-12 19:55:55,516 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-12 19:55:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:55,553 INFO L93 Difference]: Finished difference Result 337 states and 960 transitions. [2021-06-12 19:55:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:55:55,553 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 [2021-06-12 19:55:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:55,554 INFO L225 Difference]: With dead ends: 337 [2021-06-12 19:55:55,554 INFO L226 Difference]: Without dead ends: 333 [2021-06-12 19:55:55,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2081.7ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-12 19:55:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 219. [2021-06-12 19:55:55,556 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) [2021-06-12 19:55:55,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:55:55,557 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:55:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:55,557 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:55:55,557 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) [2021-06-12 19:55:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:55:55,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:55,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:55,557 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:55,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3843,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:55,758 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:55,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 692518350, now seen corresponding path program 100 times [2021-06-12 19:55:55,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:55,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982446165] [2021-06-12 19:55:55,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:55,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:55,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982446165] [2021-06-12 19:55:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982446165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726347015] [2021-06-12 19:55:55,981 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 [2021-06-12 19:55:56,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:56,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:56,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:56,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:56,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:56,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,133 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 [2021-06-12 19:55:56,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:56,139 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 [2021-06-12 19:55:56,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,143 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 25 treesize of output 19 [2021-06-12 19:55:56,145 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:56,197 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:123 [2021-06-12 19:55:56,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,285 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 18 treesize of output 14 [2021-06-12 19:55:56,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,289 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 15 treesize of output 11 [2021-06-12 19:55:56,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,293 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 25 treesize of output 19 [2021-06-12 19:55:56,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,297 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 [2021-06-12 19:55:56,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,302 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 35 treesize of output 27 [2021-06-12 19:55:56,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:56,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,307 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 37 treesize of output 29 [2021-06-12 19:55:56,308 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,312 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 [2021-06-12 19:55:56,313 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,317 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 27 treesize of output 21 [2021-06-12 19:55:56,318 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:56,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,322 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 [2021-06-12 19:55:56,323 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:56,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:55:56,327 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,490 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-12 19:55:56,491 INFO L628 ElimStorePlain]: treesize reduction 183, result has 59.0 percent of original size [2021-06-12 19:55:56,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,494 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 12 treesize of output 5 [2021-06-12 19:55:56,495 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,498 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 20 treesize of output 9 [2021-06-12 19:55:56,499 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,502 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 [2021-06-12 19:55:56,503 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,506 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 11 treesize of output 3 [2021-06-12 19:55:56,507 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,517 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 [2021-06-12 19:55:56,518 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,521 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 11 treesize of output 3 [2021-06-12 19:55:56,522 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,532 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 44 treesize of output 19 [2021-06-12 19:55:56,533 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,536 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 12 treesize of output 5 [2021-06-12 19:55:56,537 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,548 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 10 treesize of output 5 [2021-06-12 19:55:56,549 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:56,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:55:56,616 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:373, output treesize:164 [2021-06-12 19:55:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726347015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:56,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:55:56,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028714653] [2021-06-12 19:55:56,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:55:56,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:56,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:55:56,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:55:56,770 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) [2021-06-12 19:55:57,264 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-12 19:55:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:57,306 INFO L93 Difference]: Finished difference Result 259 states and 751 transitions. [2021-06-12 19:55:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:55:57,307 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 [2021-06-12 19:55:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:57,307 INFO L225 Difference]: With dead ends: 259 [2021-06-12 19:55:57,307 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:55:57,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 742.4ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:55:57,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 223. [2021-06-12 19:55:57,309 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) [2021-06-12 19:55:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-06-12 19:55:57,310 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-06-12 19:55:57,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:57,310 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-06-12 19:55:57,310 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) [2021-06-12 19:55:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-06-12 19:55:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:57,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:57,310 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:57,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3856 [2021-06-12 19:55:57,525 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2121211076, now seen corresponding path program 101 times [2021-06-12 19:55:57,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:57,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640646816] [2021-06-12 19:55:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640646816] [2021-06-12 19:55:57,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640646816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987121152] [2021-06-12 19:55:57,762 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 [2021-06-12 19:55:57,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:57,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:57,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:55:57,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:57,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,871 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 15 treesize of output 11 [2021-06-12 19:55:57,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,875 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 [2021-06-12 19:55:57,876 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:55:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,880 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 25 treesize of output 19 [2021-06-12 19:55:57,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,884 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 [2021-06-12 19:55:57,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:57,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:55:57,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:163, output treesize:223 [2021-06-12 19:55:58,050 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_957, array_2, v_prenex_959, v_prenex_961], 1=[v_prenex_958, array_4, v_prenex_960, v_prenex_962]} [2021-06-12 19:55:58,055 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 25 treesize of output 19 [2021-06-12 19:55:58,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,060 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 27 treesize of output 21 [2021-06-12 19:55:58,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:58,279 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-12 19:55:58,280 INFO L628 ElimStorePlain]: treesize reduction 212, result has 62.5 percent of original size [2021-06-12 19:55:58,283 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 30 treesize of output 24 [2021-06-12 19:55:58,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,305 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 48 treesize of output 38 [2021-06-12 19:55:58,307 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:58,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,318 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 19 treesize of output 15 [2021-06-12 19:55:58,319 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:55:58,325 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,329 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 30 treesize of output 24 [2021-06-12 19:55:58,330 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,483 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 19:55:58,483 INFO L628 ElimStorePlain]: treesize reduction 52, result has 83.2 percent of original size [2021-06-12 19:55:58,487 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 7 treesize of output 5 [2021-06-12 19:55:58,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,564 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 [2021-06-12 19:55:58,565 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:55:58,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,646 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 10 treesize of output 5 [2021-06-12 19:55:58,646 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,649 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 [2021-06-12 19:55:58,650 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,733 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 [2021-06-12 19:55:58,734 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,738 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 [2021-06-12 19:55:58,738 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,742 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 [2021-06-12 19:55:58,743 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,746 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 [2021-06-12 19:55:58,747 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,750 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 12 treesize of output 5 [2021-06-12 19:55:58,750 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,819 INFO L518 ElimStorePlain]: Eliminatee v_prenex_960 vanished before elimination [2021-06-12 19:55:58,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,822 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 11 treesize of output 3 [2021-06-12 19:55:58,823 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,826 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 21 treesize of output 7 [2021-06-12 19:55:58,826 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:55:58,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:55:58,903 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-06-12 19:55:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:59,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987121152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:59,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:59,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:55:59,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900974775] [2021-06-12 19:55:59,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:59,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:59,057 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) [2021-06-12 19:55:59,432 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-12 19:55:59,618 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-06-12 19:55:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:59,784 INFO L93 Difference]: Finished difference Result 268 states and 765 transitions. [2021-06-12 19:55:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:55:59,784 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 [2021-06-12 19:55:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:59,785 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:55:59,785 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 19:55:59,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 931.3ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 19:55:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 226. [2021-06-12 19:55:59,787 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) [2021-06-12 19:55:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 672 transitions. [2021-06-12 19:55:59,787 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 672 transitions. Word has length 17 [2021-06-12 19:55:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:59,787 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 672 transitions. [2021-06-12 19:55:59,787 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) [2021-06-12 19:55:59,788 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 672 transitions. [2021-06-12 19:55:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:59,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:59,788 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:59,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3873,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:59,988 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash 502780204, now seen corresponding path program 102 times [2021-06-12 19:55:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:59,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067955289] [2021-06-12 19:55:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:00,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067955289] [2021-06-12 19:56:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067955289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758372361] [2021-06-12 19:56:00,192 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 [2021-06-12 19:56:00,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:00,354 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 [2021-06-12 19:56:00,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,357 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 15 treesize of output 11 [2021-06-12 19:56:00,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,364 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 [2021-06-12 19:56:00,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:00,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:00,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,371 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 17 treesize of output 13 [2021-06-12 19:56:00,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,373 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 17 treesize of output 13 [2021-06-12 19:56:00,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,428 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-12 19:56:00,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:00,429 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-12 19:56:00,499 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 21 treesize of output 17 [2021-06-12 19:56:00,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,502 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 30 treesize of output 24 [2021-06-12 19:56:00,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,506 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 19 treesize of output 15 [2021-06-12 19:56:00,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,509 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 28 treesize of output 22 [2021-06-12 19:56:00,510 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,544 INFO L628 ElimStorePlain]: treesize reduction 73, result has 36.5 percent of original size [2021-06-12 19:56:00,545 INFO L518 ElimStorePlain]: Eliminatee v_prenex_966 vanished before elimination [2021-06-12 19:56:00,545 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:00,545 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:00,546 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 19 treesize of output 15 [2021-06-12 19:56:00,547 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:00,556 INFO L518 ElimStorePlain]: Eliminatee v_prenex_964 vanished before elimination [2021-06-12 19:56:00,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:00,557 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-12 19:56:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758372361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:00,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:00,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880000865] [2021-06-12 19:56:00,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:00,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:00,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:00,588 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) [2021-06-12 19:56:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:01,234 INFO L93 Difference]: Finished difference Result 268 states and 757 transitions. [2021-06-12 19:56:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:01,235 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 [2021-06-12 19:56:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:01,235 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:56:01,235 INFO L226 Difference]: Without dead ends: 260 [2021-06-12 19:56:01,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 752.9ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-06-12 19:56:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 220. [2021-06-12 19:56:01,237 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) [2021-06-12 19:56:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 651 transitions. [2021-06-12 19:56:01,238 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 651 transitions. Word has length 17 [2021-06-12 19:56:01,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:01,238 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 651 transitions. [2021-06-12 19:56:01,238 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) [2021-06-12 19:56:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 651 transitions. [2021-06-12 19:56:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:01,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:01,238 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:01,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-12 19:56:01,439 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:01,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1572294666, now seen corresponding path program 103 times [2021-06-12 19:56:01,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:01,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341442658] [2021-06-12 19:56:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341442658] [2021-06-12 19:56:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341442658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245896646] [2021-06-12 19:56:01,673 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 [2021-06-12 19:56:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:01,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:01,777 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 25 treesize of output 19 [2021-06-12 19:56:01,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,780 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 27 treesize of output 21 [2021-06-12 19:56:01,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:01,783 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 15 treesize of output 11 [2021-06-12 19:56:01,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:01,787 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:01,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:01,815 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:56:01,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,905 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 25 treesize of output 19 [2021-06-12 19:56:01,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,909 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 [2021-06-12 19:56:01,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:01,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,913 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 28 treesize of output 22 [2021-06-12 19:56:01,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:01,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,917 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 [2021-06-12 19:56:01,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,921 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 35 treesize of output 27 [2021-06-12 19:56:01,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:01,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,926 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 37 treesize of output 29 [2021-06-12 19:56:01,927 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:01,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:01,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,934 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 [2021-06-12 19:56:01,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,938 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 [2021-06-12 19:56:01,939 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,941 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 [2021-06-12 19:56:01,942 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,085 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 19:56:02,086 INFO L628 ElimStorePlain]: treesize reduction 177, result has 57.8 percent of original size [2021-06-12 19:56:02,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,089 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 10 treesize of output 5 [2021-06-12 19:56:02,089 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,093 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 [2021-06-12 19:56:02,093 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,111 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 21 treesize of output 7 [2021-06-12 19:56:02,112 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,115 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 11 treesize of output 3 [2021-06-12 19:56:02,115 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,126 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 [2021-06-12 19:56:02,126 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,129 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 44 treesize of output 19 [2021-06-12 19:56:02,130 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,133 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 12 treesize of output 5 [2021-06-12 19:56:02,133 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,145 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 [2021-06-12 19:56:02,146 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,148 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 11 treesize of output 3 [2021-06-12 19:56:02,149 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:02,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:02,215 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:56:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245896646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:02,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:02,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308657492] [2021-06-12 19:56:02,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:02,343 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) [2021-06-12 19:56:02,763 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 19:56:02,940 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:56:03,194 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:56:03,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:03,232 INFO L93 Difference]: Finished difference Result 269 states and 773 transitions. [2021-06-12 19:56:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:03,232 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 [2021-06-12 19:56:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:03,233 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:56:03,233 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:56:03,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1041.0ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:03,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:56:03,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2021-06-12 19:56:03,237 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) [2021-06-12 19:56:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-06-12 19:56:03,238 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-06-12 19:56:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:03,238 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-06-12 19:56:03,238 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) [2021-06-12 19:56:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-06-12 19:56:03,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:03,238 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:03,238 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:03,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3915 [2021-06-12 19:56:03,439 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:03,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1907866476, now seen corresponding path program 104 times [2021-06-12 19:56:03,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:03,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835014574] [2021-06-12 19:56:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:03,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835014574] [2021-06-12 19:56:03,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835014574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010161598] [2021-06-12 19:56:03,706 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 [2021-06-12 19:56:03,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:56:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:03,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:03,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,830 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 27 treesize of output 21 [2021-06-12 19:56:03,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:03,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:03,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:03,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:03,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:03,885 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:110, output treesize:100 [2021-06-12 19:56:03,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:03,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,945 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 19 treesize of output 15 [2021-06-12 19:56:03,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,948 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 28 treesize of output 22 [2021-06-12 19:56:03,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:03,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,988 INFO L628 ElimStorePlain]: treesize reduction 18, result has 80.4 percent of original size [2021-06-12 19:56:03,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:03,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:04,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_969 vanished before elimination [2021-06-12 19:56:04,009 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:04,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:04,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:04,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:04,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_971 vanished before elimination [2021-06-12 19:56:04,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:04,033 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:164, output treesize:52 [2021-06-12 19:56:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010161598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:04,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-06-12 19:56:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505380598] [2021-06-12 19:56:04,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:04,086 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) [2021-06-12 19:56:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:04,423 INFO L93 Difference]: Finished difference Result 255 states and 740 transitions. [2021-06-12 19:56:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:04,424 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 [2021-06-12 19:56:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:04,424 INFO L225 Difference]: With dead ends: 255 [2021-06-12 19:56:04,424 INFO L226 Difference]: Without dead ends: 251 [2021-06-12 19:56:04,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 535.7ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-12 19:56:04,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2021-06-12 19:56:04,426 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) [2021-06-12 19:56:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 651 transitions. [2021-06-12 19:56:04,426 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 651 transitions. Word has length 17 [2021-06-12 19:56:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:04,426 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 651 transitions. [2021-06-12 19:56:04,427 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) [2021-06-12 19:56:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 651 transitions. [2021-06-12 19:56:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:04,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:04,427 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:04,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3933 [2021-06-12 19:56:04,627 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1365201684, now seen corresponding path program 105 times [2021-06-12 19:56:04,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:04,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004512986] [2021-06-12 19:56:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:04,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004512986] [2021-06-12 19:56:04,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004512986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386526006] [2021-06-12 19:56:04,812 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 [2021-06-12 19:56:04,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:04,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:04,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,944 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 15 treesize of output 11 [2021-06-12 19:56:04,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,948 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 17 treesize of output 13 [2021-06-12 19:56:04,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,952 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 [2021-06-12 19:56:04,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:04,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,957 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 [2021-06-12 19:56:04,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:05,023 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. [2021-06-12 19:56:05,024 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:197, output treesize:187 [2021-06-12 19:56:05,467 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 85 [2021-06-12 19:56:05,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,758 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 [2021-06-12 19:56:05,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,766 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 15 treesize of output 11 [2021-06-12 19:56:05,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,961 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 103 [2021-06-12 19:56:05,962 INFO L628 ElimStorePlain]: treesize reduction 150, result has 62.2 percent of original size [2021-06-12 19:56:05,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,967 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 19 treesize of output 15 [2021-06-12 19:56:05,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,043 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:06,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:06,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_991 vanished before elimination [2021-06-12 19:56:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,127 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 11 treesize of output 3 [2021-06-12 19:56:06,128 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,205 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 27 treesize of output 21 [2021-06-12 19:56:06,206 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:06,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,288 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 10 treesize of output 5 [2021-06-12 19:56:06,288 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,293 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 20 treesize of output 9 [2021-06-12 19:56:06,293 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,384 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 19 treesize of output 15 [2021-06-12 19:56:06,385 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,389 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 17 [2021-06-12 19:56:06,390 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,464 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 11 treesize of output 3 [2021-06-12 19:56:06,465 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,469 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 12 treesize of output 5 [2021-06-12 19:56:06,470 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,542 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 28 treesize of output 22 [2021-06-12 19:56:06,543 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,547 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 30 treesize of output 24 [2021-06-12 19:56:06,548 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,617 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 24 treesize of output 9 [2021-06-12 19:56:06,618 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,622 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 21 treesize of output 7 [2021-06-12 19:56:06,622 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:06,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:56:06,685 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:411, output treesize:62 [2021-06-12 19:56:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:06,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386526006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:06,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:56:06,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368540622] [2021-06-12 19:56:06,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:06,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:06,732 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) [2021-06-12 19:56:07,087 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-12 19:56:07,630 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 148 [2021-06-12 19:56:07,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:07,815 INFO L93 Difference]: Finished difference Result 253 states and 730 transitions. [2021-06-12 19:56:07,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:07,815 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 [2021-06-12 19:56:07,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:07,816 INFO L225 Difference]: With dead ends: 253 [2021-06-12 19:56:07,816 INFO L226 Difference]: Without dead ends: 249 [2021-06-12 19:56:07,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1288.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:07,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-12 19:56:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-06-12 19:56:07,818 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) [2021-06-12 19:56:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 665 transitions. [2021-06-12 19:56:07,819 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 665 transitions. Word has length 17 [2021-06-12 19:56:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:07,819 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 665 transitions. [2021-06-12 19:56:07,819 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) [2021-06-12 19:56:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 665 transitions. [2021-06-12 19:56:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:07,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:07,819 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:08,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3949,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:08,020 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 50467208, now seen corresponding path program 106 times [2021-06-12 19:56:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:08,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020023359] [2021-06-12 19:56:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:08,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020023359] [2021-06-12 19:56:08,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020023359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175527183] [2021-06-12 19:56:08,276 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 [2021-06-12 19:56:08,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:08,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:08,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:08,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:08,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,443 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 15 treesize of output 11 [2021-06-12 19:56:08,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,449 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 [2021-06-12 19:56:08,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,454 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 35 treesize of output 27 [2021-06-12 19:56:08,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:08,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,468 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 [2021-06-12 19:56:08,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:08,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:219 [2021-06-12 19:56:08,662 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1002, v_prenex_1004, v_prenex_1006], 1=[array_4, v_prenex_1003, v_prenex_1005, v_prenex_1007]} [2021-06-12 19:56:08,667 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 48 treesize of output 38 [2021-06-12 19:56:08,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,672 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 30 treesize of output 24 [2021-06-12 19:56:08,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:08,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,683 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 28 treesize of output 22 [2021-06-12 19:56:08,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,688 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 46 treesize of output 36 [2021-06-12 19:56:08,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,694 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 28 treesize of output 22 [2021-06-12 19:56:08,694 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:08,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:08,705 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,874 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-12 19:56:08,874 INFO L628 ElimStorePlain]: treesize reduction 257, result has 49.2 percent of original size [2021-06-12 19:56:08,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:08,878 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:08,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:08,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:08,957 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,037 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 [2021-06-12 19:56:09,038 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:09,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,119 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 [2021-06-12 19:56:09,120 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,128 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 11 treesize of output 3 [2021-06-12 19:56:09,129 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,132 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 44 treesize of output 19 [2021-06-12 19:56:09,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,137 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 21 treesize of output 7 [2021-06-12 19:56:09,137 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,141 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 12 treesize of output 5 [2021-06-12 19:56:09,141 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,216 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 10 treesize of output 5 [2021-06-12 19:56:09,216 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,219 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 20 treesize of output 9 [2021-06-12 19:56:09,220 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,295 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1005 vanished before elimination [2021-06-12 19:56:09,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,298 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 21 treesize of output 7 [2021-06-12 19:56:09,299 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,302 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 11 treesize of output 3 [2021-06-12 19:56:09,302 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:09,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:09,376 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-06-12 19:56:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:09,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175527183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:09,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:56:09,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178543054] [2021-06-12 19:56:09,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:09,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:09,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:09,541 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) [2021-06-12 19:56:09,946 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 19:56:10,150 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-12 19:56:10,376 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 19:56:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:10,419 INFO L93 Difference]: Finished difference Result 276 states and 782 transitions. [2021-06-12 19:56:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:10,419 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 [2021-06-12 19:56:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:10,420 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:56:10,420 INFO L226 Difference]: Without dead ends: 272 [2021-06-12 19:56:10,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1112.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-12 19:56:10,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 224. [2021-06-12 19:56:10,422 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) [2021-06-12 19:56:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 665 transitions. [2021-06-12 19:56:10,423 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 665 transitions. Word has length 17 [2021-06-12 19:56:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:10,423 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 665 transitions. [2021-06-12 19:56:10,423 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) [2021-06-12 19:56:10,423 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 665 transitions. [2021-06-12 19:56:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:10,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:10,423 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:10,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4032 [2021-06-12 19:56:10,624 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash 592786076, now seen corresponding path program 107 times [2021-06-12 19:56:10,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:10,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262594911] [2021-06-12 19:56:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:10,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262594911] [2021-06-12 19:56:10,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262594911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657776667] [2021-06-12 19:56:10,782 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 [2021-06-12 19:56:10,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:10,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:10,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,877 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 17 treesize of output 13 [2021-06-12 19:56:10,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,880 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 15 treesize of output 11 [2021-06-12 19:56:10,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,890 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 [2021-06-12 19:56:10,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,894 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 27 treesize of output 21 [2021-06-12 19:56:10,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:10,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:10,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:10,933 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-12 19:56:11,018 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1009, v_prenex_1011, array_4, v_prenex_1013], 1=[array_2, v_prenex_1010, v_prenex_1012, v_prenex_1008]} [2021-06-12 19:56:11,023 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 25 treesize of output 19 [2021-06-12 19:56:11,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,027 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 35 treesize of output 27 [2021-06-12 19:56:11,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:11,189 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-12 19:56:11,190 INFO L628 ElimStorePlain]: treesize reduction 145, result has 65.0 percent of original size [2021-06-12 19:56:11,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:11,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,197 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 [2021-06-12 19:56:11,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:11,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,283 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 38 treesize of output 30 [2021-06-12 19:56:11,284 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:11,288 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 19 treesize of output 15 [2021-06-12 19:56:11,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,292 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 21 treesize of output 17 [2021-06-12 19:56:11,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:11,297 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,447 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-12 19:56:11,447 INFO L628 ElimStorePlain]: treesize reduction 11, result has 96.2 percent of original size [2021-06-12 19:56:11,450 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 [2021-06-12 19:56:11,451 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,582 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-12 19:56:11,583 INFO L628 ElimStorePlain]: treesize reduction 23, result has 91.5 percent of original size [2021-06-12 19:56:11,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,586 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 12 treesize of output 5 [2021-06-12 19:56:11,587 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,590 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 [2021-06-12 19:56:11,591 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,594 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 12 treesize of output 5 [2021-06-12 19:56:11,595 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,598 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 46 treesize of output 15 [2021-06-12 19:56:11,598 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,610 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 [2021-06-12 19:56:11,611 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,677 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 11 treesize of output 3 [2021-06-12 19:56:11,677 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,680 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 21 treesize of output 7 [2021-06-12 19:56:11,680 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1012 vanished before elimination [2021-06-12 19:56:11,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,751 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 20 treesize of output 9 [2021-06-12 19:56:11,751 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,754 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 20 treesize of output 9 [2021-06-12 19:56:11,754 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:11,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:11,819 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 8 variables, input treesize:344, output treesize:136 [2021-06-12 19:56:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657776667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:11,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:56:11,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979092686] [2021-06-12 19:56:11,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:11,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:11,958 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) [2021-06-12 19:56:12,578 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-06-12 19:56:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:12,626 INFO L93 Difference]: Finished difference Result 268 states and 768 transitions. [2021-06-12 19:56:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:12,627 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 [2021-06-12 19:56:12,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:12,627 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:56:12,627 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 19:56:12,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 821.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 19:56:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 222. [2021-06-12 19:56:12,629 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) [2021-06-12 19:56:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-06-12 19:56:12,630 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-06-12 19:56:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:12,630 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-06-12 19:56:12,630 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) [2021-06-12 19:56:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-06-12 19:56:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:12,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:12,630 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:12,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4050 [2021-06-12 19:56:12,831 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1022618172, now seen corresponding path program 108 times [2021-06-12 19:56:12,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:12,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805099026] [2021-06-12 19:56:12,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:12,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805099026] [2021-06-12 19:56:12,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805099026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314233516] [2021-06-12 19:56:12,968 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 [2021-06-12 19:56:12,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:12,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:13,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,107 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 17 treesize of output 13 [2021-06-12 19:56:13,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,112 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 [2021-06-12 19:56:13,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,116 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 [2021-06-12 19:56:13,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,121 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 27 treesize of output 21 [2021-06-12 19:56:13,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:13,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:13,173 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:56:13,258 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1015, v_prenex_1017, v_prenex_1019], 1=[array_0, v_prenex_1014, v_prenex_1016, v_prenex_1018]} [2021-06-12 19:56:13,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:13,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:13,268 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 28 treesize of output 22 [2021-06-12 19:56:13,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:13,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,277 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 38 treesize of output 30 [2021-06-12 19:56:13,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:13,470 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 19:56:13,470 INFO L628 ElimStorePlain]: treesize reduction 88, result has 78.4 percent of original size [2021-06-12 19:56:13,474 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 27 treesize of output 21 [2021-06-12 19:56:13,479 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:13,653 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-06-12 19:56:13,653 INFO L628 ElimStorePlain]: treesize reduction 39, result has 88.2 percent of original size [2021-06-12 19:56:13,656 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 27 treesize of output 21 [2021-06-12 19:56:13,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:13,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:13,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,749 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 [2021-06-12 19:56:13,750 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,901 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-12 19:56:13,901 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.9 percent of original size [2021-06-12 19:56:13,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,905 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 12 treesize of output 5 [2021-06-12 19:56:13,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,910 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 44 treesize of output 19 [2021-06-12 19:56:13,910 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:13,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,924 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 12 treesize of output 5 [2021-06-12 19:56:13,924 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,928 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 11 treesize of output 3 [2021-06-12 19:56:13,929 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,932 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 [2021-06-12 19:56:13,933 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,008 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 11 treesize of output 3 [2021-06-12 19:56:14,008 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,011 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 21 treesize of output 7 [2021-06-12 19:56:14,012 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,090 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 [2021-06-12 19:56:14,091 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:14,094 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 10 treesize of output 5 [2021-06-12 19:56:14,094 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:14,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:14,165 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1018 vanished before elimination [2021-06-12 19:56:14,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:14,167 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-12 19:56:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:14,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314233516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:14,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:56:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248456185] [2021-06-12 19:56:14,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:14,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:14,333 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) [2021-06-12 19:56:14,662 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-12 19:56:14,827 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-12 19:56:15,037 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-06-12 19:56:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:15,072 INFO L93 Difference]: Finished difference Result 263 states and 754 transitions. [2021-06-12 19:56:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:15,072 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 [2021-06-12 19:56:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:15,072 INFO L225 Difference]: With dead ends: 263 [2021-06-12 19:56:15,072 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:56:15,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 877.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:15,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:56:15,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2021-06-12 19:56:15,075 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) [2021-06-12 19:56:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:56:15,076 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:56:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:15,076 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:56:15,076 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) [2021-06-12 19:56:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:56:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:15,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:15,076 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:15,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4070,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:15,281 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1599914564, now seen corresponding path program 109 times [2021-06-12 19:56:15,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:15,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107176826] [2021-06-12 19:56:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:15,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:15,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107176826] [2021-06-12 19:56:15,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107176826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303003215] [2021-06-12 19:56:15,562 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 [2021-06-12 19:56:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:15,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:15,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:15,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,664 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 [2021-06-12 19:56:15,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,667 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 35 treesize of output 27 [2021-06-12 19:56:15,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,672 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 [2021-06-12 19:56:15,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,675 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 25 treesize of output 19 [2021-06-12 19:56:15,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:15,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:15,731 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:213 [2021-06-12 19:56:15,915 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-12 19:56:15,918 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 15 treesize of output 11 [2021-06-12 19:56:15,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,922 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 [2021-06-12 19:56:15,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:15,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:15,930 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,934 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 27 treesize of output 21 [2021-06-12 19:56:15,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:15,938 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 25 treesize of output 19 [2021-06-12 19:56:15,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,942 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 27 treesize of output 21 [2021-06-12 19:56:15,943 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:15,946 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 [2021-06-12 19:56:15,947 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:15,952 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,955 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 28 treesize of output 22 [2021-06-12 19:56:15,956 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,959 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 46 treesize of output 36 [2021-06-12 19:56:15,960 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:15,964 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,968 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 30 treesize of output 24 [2021-06-12 19:56:15,969 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,972 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 [2021-06-12 19:56:15,973 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,141 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-06-12 19:56:16,141 INFO L628 ElimStorePlain]: treesize reduction 213, result has 55.7 percent of original size [2021-06-12 19:56:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,146 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 12 treesize of output 5 [2021-06-12 19:56:16,146 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,150 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 11 treesize of output 3 [2021-06-12 19:56:16,151 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,155 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 44 treesize of output 19 [2021-06-12 19:56:16,156 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,159 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 21 treesize of output 7 [2021-06-12 19:56:16,160 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,163 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 12 treesize of output 5 [2021-06-12 19:56:16,164 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,167 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 21 treesize of output 7 [2021-06-12 19:56:16,168 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,171 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 11 treesize of output 3 [2021-06-12 19:56:16,171 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,186 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 10 treesize of output 5 [2021-06-12 19:56:16,187 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,189 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 20 treesize of output 9 [2021-06-12 19:56:16,190 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:16,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:16,264 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:575, output treesize:169 [2021-06-12 19:56:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303003215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:16,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 19:56:16,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514149351] [2021-06-12 19:56:16,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:16,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:16,425 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) [2021-06-12 19:56:16,844 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-12 19:56:17,076 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-12 19:56:17,406 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 90 [2021-06-12 19:56:17,769 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-12 19:56:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:17,816 INFO L93 Difference]: Finished difference Result 323 states and 924 transitions. [2021-06-12 19:56:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:17,817 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 [2021-06-12 19:56:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:17,817 INFO L225 Difference]: With dead ends: 323 [2021-06-12 19:56:17,817 INFO L226 Difference]: Without dead ends: 319 [2021-06-12 19:56:17,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1592.7ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-12 19:56:17,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 226. [2021-06-12 19:56:17,820 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) [2021-06-12 19:56:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 676 transitions. [2021-06-12 19:56:17,820 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 676 transitions. Word has length 17 [2021-06-12 19:56:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:17,820 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 676 transitions. [2021-06-12 19:56:17,820 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) [2021-06-12 19:56:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 676 transitions. [2021-06-12 19:56:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:17,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:17,821 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:18,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-06-12 19:56:18,021 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:18,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:18,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1024076716, now seen corresponding path program 110 times [2021-06-12 19:56:18,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:18,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776416205] [2021-06-12 19:56:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:18,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:18,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776416205] [2021-06-12 19:56:18,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776416205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584071547] [2021-06-12 19:56:18,225 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 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 [2021-06-12 19:56:18,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:18,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:18,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:18,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:18,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,318 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 [2021-06-12 19:56:18,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,322 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 35 treesize of output 27 [2021-06-12 19:56:18,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,326 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 25 treesize of output 19 [2021-06-12 19:56:18,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,330 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 25 treesize of output 19 [2021-06-12 19:56:18,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:18,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-12 19:56:18,757 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1030, array_2, v_prenex_1023, v_prenex_1026, v_prenex_1028], 1=[v_prenex_1031, array_4, v_prenex_1024, v_prenex_1027, v_prenex_1029]} [2021-06-12 19:56:18,762 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 15 treesize of output 11 [2021-06-12 19:56:18,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:18,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,873 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-06-12 19:56:18,873 INFO L628 ElimStorePlain]: treesize reduction 103, result has 64.0 percent of original size [2021-06-12 19:56:18,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:18,877 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,923 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 28 treesize of output 22 [2021-06-12 19:56:18,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,928 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 30 treesize of output 24 [2021-06-12 19:56:18,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:18,970 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:19,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:19,020 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:19,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,067 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1031 vanished before elimination [2021-06-12 19:56:19,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,071 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 12 treesize of output 5 [2021-06-12 19:56:19,071 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,122 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 21 treesize of output 7 [2021-06-12 19:56:19,123 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,126 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 24 treesize of output 9 [2021-06-12 19:56:19,127 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,175 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 10 treesize of output 5 [2021-06-12 19:56:19,176 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,179 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 20 treesize of output 9 [2021-06-12 19:56:19,179 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,232 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 11 treesize of output 3 [2021-06-12 19:56:19,233 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:19,236 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 21 treesize of output 7 [2021-06-12 19:56:19,236 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:19,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:19,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:19,286 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 15 variables, input treesize:319, output treesize:63 [2021-06-12 19:56:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:19,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584071547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:19,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:19,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:56:19,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474607918] [2021-06-12 19:56:19,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:19,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:19,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:19,336 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) [2021-06-12 19:56:19,686 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-06-12 19:56:19,901 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 19:56:20,100 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-06-12 19:56:20,358 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 106 [2021-06-12 19:56:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:20,442 INFO L93 Difference]: Finished difference Result 320 states and 919 transitions. [2021-06-12 19:56:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:20,443 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 [2021-06-12 19:56:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:20,443 INFO L225 Difference]: With dead ends: 320 [2021-06-12 19:56:20,443 INFO L226 Difference]: Without dead ends: 316 [2021-06-12 19:56:20,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1315.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-12 19:56:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 221. [2021-06-12 19:56:20,445 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) [2021-06-12 19:56:20,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-12 19:56:20,446 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-12 19:56:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:20,446 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-12 19:56:20,446 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) [2021-06-12 19:56:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-12 19:56:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:20,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:20,446 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:20,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4108,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:20,647 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:20,647 INFO L82 PathProgramCache]: Analyzing trace with hash -324965886, now seen corresponding path program 111 times [2021-06-12 19:56:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:20,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645757289] [2021-06-12 19:56:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:20,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645757289] [2021-06-12 19:56:20,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645757289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:20,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477248672] [2021-06-12 19:56:20,914 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 [2021-06-12 19:56:20,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:20,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:20,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:21,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,121 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 17 treesize of output 13 [2021-06-12 19:56:21,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,126 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 [2021-06-12 19:56:21,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,130 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 25 treesize of output 19 [2021-06-12 19:56:21,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:21,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,134 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 27 treesize of output 21 [2021-06-12 19:56:21,135 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:21,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:21,203 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. [2021-06-12 19:56:21,204 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:203, output treesize:193 [2021-06-12 19:56:21,598 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 98 [2021-06-12 19:56:21,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,871 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 27 treesize of output 21 [2021-06-12 19:56:21,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:21,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:21,879 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 17 treesize of output 13 [2021-06-12 19:56:21,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,228 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 119 [2021-06-12 19:56:22,229 INFO L628 ElimStorePlain]: treesize reduction 188, result has 60.8 percent of original size [2021-06-12 19:56:22,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,235 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 [2021-06-12 19:56:22,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,329 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 19 treesize of output 15 [2021-06-12 19:56:22,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,336 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 21 treesize of output 17 [2021-06-12 19:56:22,336 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,425 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 12 treesize of output 5 [2021-06-12 19:56:22,425 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,431 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 11 treesize of output 3 [2021-06-12 19:56:22,431 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,516 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 7 treesize of output 5 [2021-06-12 19:56:22,517 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,596 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:22,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,601 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 27 treesize of output 21 [2021-06-12 19:56:22,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:22,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,690 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 10 treesize of output 5 [2021-06-12 19:56:22,690 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,695 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 [2021-06-12 19:56:22,696 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:56:22,792 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,801 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 30 treesize of output 24 [2021-06-12 19:56:22,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,880 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 7 treesize of output 5 [2021-06-12 19:56:22,881 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:22,955 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1058 vanished before elimination [2021-06-12 19:56:22,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,960 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 [2021-06-12 19:56:22,961 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,965 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 24 treesize of output 9 [2021-06-12 19:56:22,965 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:23,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:23,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:56:23,042 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 24 variables, input treesize:475, output treesize:82 [2021-06-12 19:56:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:23,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477248672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:23,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:23,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:56:23,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642828055] [2021-06-12 19:56:23,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:23,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:23,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:23,097 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) [2021-06-12 19:56:23,895 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 163 [2021-06-12 19:56:24,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:24,035 INFO L93 Difference]: Finished difference Result 266 states and 769 transitions. [2021-06-12 19:56:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:24,035 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 [2021-06-12 19:56:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:24,035 INFO L225 Difference]: With dead ends: 266 [2021-06-12 19:56:24,035 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 19:56:24,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1182.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:24,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 19:56:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 225. [2021-06-12 19:56:24,038 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) [2021-06-12 19:56:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 668 transitions. [2021-06-12 19:56:24,038 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 668 transitions. Word has length 17 [2021-06-12 19:56:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:24,038 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 668 transitions. [2021-06-12 19:56:24,038 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) [2021-06-12 19:56:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 668 transitions. [2021-06-12 19:56:24,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:24,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:24,039 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:24,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4133 [2021-06-12 19:56:24,239 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1090703006, now seen corresponding path program 112 times [2021-06-12 19:56:24,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:24,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111166562] [2021-06-12 19:56:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:24,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:24,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111166562] [2021-06-12 19:56:24,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111166562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:24,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339776341] [2021-06-12 19:56:24,482 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 [2021-06-12 19:56:24,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:24,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,616 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 35 treesize of output 27 [2021-06-12 19:56:24,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,621 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 15 treesize of output 11 [2021-06-12 19:56:24,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:24,624 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 25 treesize of output 19 [2021-06-12 19:56:24,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,628 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 25 treesize of output 19 [2021-06-12 19:56:24,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:24,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:24,682 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-12 19:56:24,785 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1060, v_prenex_1062, v_prenex_1064, array_2], 1=[v_prenex_1061, v_prenex_1063, array_4, v_prenex_1065]} [2021-06-12 19:56:24,789 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 27 treesize of output 21 [2021-06-12 19:56:24,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:24,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:24,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:24,983 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 19:56:24,983 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.5 percent of original size [2021-06-12 19:56:24,986 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 27 treesize of output 21 [2021-06-12 19:56:24,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:25,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,079 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 30 treesize of output 24 [2021-06-12 19:56:25,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,083 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 30 treesize of output 24 [2021-06-12 19:56:25,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,088 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 28 treesize of output 22 [2021-06-12 19:56:25,088 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,092 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 30 treesize of output 24 [2021-06-12 19:56:25,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,097 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 28 treesize of output 22 [2021-06-12 19:56:25,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,101 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 48 treesize of output 38 [2021-06-12 19:56:25,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,239 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-12 19:56:25,240 INFO L628 ElimStorePlain]: treesize reduction 49, result has 83.7 percent of original size [2021-06-12 19:56:25,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:25,244 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,313 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 10 treesize of output 5 [2021-06-12 19:56:25,313 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,316 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 20 treesize of output 9 [2021-06-12 19:56:25,317 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,395 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 11 treesize of output 3 [2021-06-12 19:56:25,395 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,398 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 21 treesize of output 7 [2021-06-12 19:56:25,399 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,468 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:25,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,472 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 12 treesize of output 5 [2021-06-12 19:56:25,472 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,475 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 [2021-06-12 19:56:25,476 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,479 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 44 treesize of output 19 [2021-06-12 19:56:25,479 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:25,482 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 21 treesize of output 7 [2021-06-12 19:56:25,483 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,485 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 12 treesize of output 5 [2021-06-12 19:56:25,486 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:25,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:25,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:25,545 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:56:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:25,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339776341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:25,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:25,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:25,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133980729] [2021-06-12 19:56:25,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:25,693 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) [2021-06-12 19:56:26,203 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 19:56:26,399 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2021-06-12 19:56:26,578 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-12 19:56:26,783 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 19:56:26,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:26,849 INFO L93 Difference]: Finished difference Result 288 states and 822 transitions. [2021-06-12 19:56:26,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:56:26,850 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 [2021-06-12 19:56:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:26,850 INFO L225 Difference]: With dead ends: 288 [2021-06-12 19:56:26,850 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 19:56:26,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1332.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:26,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 19:56:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 223. [2021-06-12 19:56:26,852 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) [2021-06-12 19:56:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-06-12 19:56:26,853 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-06-12 19:56:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:26,853 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-06-12 19:56:26,853 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) [2021-06-12 19:56:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-06-12 19:56:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:26,853 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:26,853 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:27,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4203,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:27,054 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash 17617626, now seen corresponding path program 113 times [2021-06-12 19:56:27,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:27,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291981005] [2021-06-12 19:56:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:27,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:27,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291981005] [2021-06-12 19:56:27,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291981005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652450689] [2021-06-12 19:56:27,180 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 [2021-06-12 19:56:27,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:27,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,336 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 [2021-06-12 19:56:27,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,340 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 [2021-06-12 19:56:27,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:27,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,385 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 27 treesize of output 21 [2021-06-12 19:56:27,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:27,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,389 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 [2021-06-12 19:56:27,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:27,435 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. [2021-06-12 19:56:27,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:156, output treesize:146 [2021-06-12 19:56:27,581 INFO L446 ElimStorePlain]: Different costs {1=[array_2], 36=[array_0]} [2021-06-12 19:56:27,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,588 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 35 treesize of output 27 [2021-06-12 19:56:27,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:27,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,598 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 19 treesize of output 15 [2021-06-12 19:56:27,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,606 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 25 treesize of output 19 [2021-06-12 19:56:27,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,615 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 28 treesize of output 22 [2021-06-12 19:56:27,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,624 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 15 treesize of output 11 [2021-06-12 19:56:27,624 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,632 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 29 treesize of output 23 [2021-06-12 19:56:27,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:27,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,642 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 25 treesize of output 19 [2021-06-12 19:56:27,643 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,651 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 25 treesize of output 19 [2021-06-12 19:56:27,652 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,660 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 35 treesize of output 27 [2021-06-12 19:56:27,661 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:27,669 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 38 treesize of output 30 [2021-06-12 19:56:27,671 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:27,950 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 84 [2021-06-12 19:56:27,951 INFO L628 ElimStorePlain]: treesize reduction 282, result has 59.0 percent of original size [2021-06-12 19:56:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,956 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 23 treesize of output 11 [2021-06-12 19:56:27,957 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,961 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 [2021-06-12 19:56:27,962 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:27,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,979 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 21 treesize of output 7 [2021-06-12 19:56:27,979 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,984 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 11 treesize of output 3 [2021-06-12 19:56:27,985 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,990 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 12 treesize of output 5 [2021-06-12 19:56:27,990 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,995 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 24 treesize of output 9 [2021-06-12 19:56:27,995 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,007 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 21 treesize of output 7 [2021-06-12 19:56:28,008 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,012 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 21 treesize of output 7 [2021-06-12 19:56:28,013 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,024 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 [2021-06-12 19:56:28,025 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:28,029 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 [2021-06-12 19:56:28,029 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:28,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,147 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-06-12 19:56:28,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:28,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:28,151 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 10 variables, input treesize:525, output treesize:233 [2021-06-12 19:56:28,303 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-06-12 19:56:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:28,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652450689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:28,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:28,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:56:28,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869848064] [2021-06-12 19:56:28,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:28,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:28,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:28,392 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) [2021-06-12 19:56:28,844 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2021-06-12 19:56:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:28,941 INFO L93 Difference]: Finished difference Result 269 states and 782 transitions. [2021-06-12 19:56:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:28,941 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 [2021-06-12 19:56:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:28,941 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:56:28,941 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 19:56:28,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 726.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 19:56:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 219. [2021-06-12 19:56:28,944 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) [2021-06-12 19:56:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:56:28,944 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:56:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:28,944 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:56:28,944 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) [2021-06-12 19:56:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:56:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:28,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:28,945 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:29,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4220 [2021-06-12 19:56:29,149 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash -574938828, now seen corresponding path program 114 times [2021-06-12 19:56:29,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:29,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125033638] [2021-06-12 19:56:29,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:29,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:29,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125033638] [2021-06-12 19:56:29,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125033638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396168311] [2021-06-12 19:56:29,323 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 [2021-06-12 19:56:29,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:29,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:29,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:29,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:29,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:29,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:29,499 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,501 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 25 treesize of output 19 [2021-06-12 19:56:29,502 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,540 INFO L628 ElimStorePlain]: treesize reduction 30, result has 72.7 percent of original size [2021-06-12 19:56:29,543 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 25 treesize of output 19 [2021-06-12 19:56:29,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,545 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 19 treesize of output 15 [2021-06-12 19:56:29,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,567 INFO L628 ElimStorePlain]: treesize reduction 16, result has 75.4 percent of original size [2021-06-12 19:56:29,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:56:29,567 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:131, output treesize:49 [2021-06-12 19:56:29,606 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 20 treesize of output 16 [2021-06-12 19:56:29,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,609 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 [2021-06-12 19:56:29,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,626 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 19 treesize of output 15 [2021-06-12 19:56:29,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,633 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 17 treesize of output 13 [2021-06-12 19:56:29,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:29,644 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 27 treesize of output 21 [2021-06-12 19:56:29,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:29,664 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:56:29,664 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:29,664 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1076 vanished before elimination [2021-06-12 19:56:29,664 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1078 vanished before elimination [2021-06-12 19:56:29,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:29,664 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:102, output treesize:26 [2021-06-12 19:56:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:29,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396168311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:29,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:29,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497162527] [2021-06-12 19:56:29,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:29,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:29,692 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) [2021-06-12 19:56:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:30,174 INFO L93 Difference]: Finished difference Result 265 states and 766 transitions. [2021-06-12 19:56:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:30,174 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 [2021-06-12 19:56:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:30,174 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:56:30,174 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:56:30,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:56:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 222. [2021-06-12 19:56:30,177 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) [2021-06-12 19:56:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 657 transitions. [2021-06-12 19:56:30,177 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 657 transitions. Word has length 17 [2021-06-12 19:56:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:30,177 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 657 transitions. [2021-06-12 19:56:30,177 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) [2021-06-12 19:56:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 657 transitions. [2021-06-12 19:56:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:30,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:30,177 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:30,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4256,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:30,378 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash 906299042, now seen corresponding path program 115 times [2021-06-12 19:56:30,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:30,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649777484] [2021-06-12 19:56:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:30,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649777484] [2021-06-12 19:56:30,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649777484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:30,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066260691] [2021-06-12 19:56:30,624 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 [2021-06-12 19:56:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:30,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:30,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:30,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,719 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 25 treesize of output 19 [2021-06-12 19:56:30,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,723 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 35 treesize of output 27 [2021-06-12 19:56:30,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:30,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,728 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 15 treesize of output 11 [2021-06-12 19:56:30,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,731 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 [2021-06-12 19:56:30,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:30,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:30,793 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:171, output treesize:231 [2021-06-12 19:56:30,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,939 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 30 treesize of output 24 [2021-06-12 19:56:30,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,945 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 [2021-06-12 19:56:30,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,950 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 25 treesize of output 19 [2021-06-12 19:56:30,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,955 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 15 treesize of output 11 [2021-06-12 19:56:30,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:30,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,965 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 [2021-06-12 19:56:30,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,970 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 30 treesize of output 24 [2021-06-12 19:56:30,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,976 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 27 treesize of output 21 [2021-06-12 19:56:30,977 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:30,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,981 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 27 treesize of output 21 [2021-06-12 19:56:30,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:30,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,987 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 28 treesize of output 22 [2021-06-12 19:56:30,988 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,993 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 30 treesize of output 24 [2021-06-12 19:56:30,994 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:30,999 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 46 treesize of output 36 [2021-06-12 19:56:30,999 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,009 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 48 treesize of output 38 [2021-06-12 19:56:31,010 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,014 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 28 treesize of output 22 [2021-06-12 19:56:31,015 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,211 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-06-12 19:56:31,212 INFO L628 ElimStorePlain]: treesize reduction 228, result has 56.2 percent of original size [2021-06-12 19:56:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,216 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 [2021-06-12 19:56:31,216 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,220 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 [2021-06-12 19:56:31,221 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,224 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 [2021-06-12 19:56:31,225 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,236 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 11 treesize of output 3 [2021-06-12 19:56:31,236 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,240 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 11 treesize of output 3 [2021-06-12 19:56:31,241 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,245 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 21 treesize of output 7 [2021-06-12 19:56:31,245 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,256 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 21 treesize of output 7 [2021-06-12 19:56:31,257 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,261 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 12 treesize of output 5 [2021-06-12 19:56:31,261 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:31,264 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 44 treesize of output 19 [2021-06-12 19:56:31,265 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:31,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:31,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:31,342 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 3 variables, input treesize:617, output treesize:169 [2021-06-12 19:56:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:31,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066260691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:31,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:31,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 19:56:31,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268500247] [2021-06-12 19:56:31,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:31,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:31,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:31,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:31,493 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) [2021-06-12 19:56:31,839 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-12 19:56:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:31,996 INFO L93 Difference]: Finished difference Result 269 states and 768 transitions. [2021-06-12 19:56:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:31,996 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 [2021-06-12 19:56:31,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:31,997 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:56:31,997 INFO L226 Difference]: Without dead ends: 265 [2021-06-12 19:56:31,997 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-06-12 19:56:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 225. [2021-06-12 19:56:31,999 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) [2021-06-12 19:56:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 669 transitions. [2021-06-12 19:56:31,999 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 669 transitions. Word has length 17 [2021-06-12 19:56:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:32,000 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 669 transitions. [2021-06-12 19:56:32,000 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) [2021-06-12 19:56:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 669 transitions. [2021-06-12 19:56:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:32,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:32,000 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:32,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4278,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:32,201 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash -764676974, now seen corresponding path program 116 times [2021-06-12 19:56:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:32,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81159008] [2021-06-12 19:56:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:32,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81159008] [2021-06-12 19:56:32,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81159008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774764868] [2021-06-12 19:56:32,388 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 [2021-06-12 19:56:32,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:32,572 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 [2021-06-12 19:56:32,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,576 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 15 treesize of output 11 [2021-06-12 19:56:32,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,579 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 27 treesize of output 21 [2021-06-12 19:56:32,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:32,583 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 25 treesize of output 19 [2021-06-12 19:56:32,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,587 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 17 treesize of output 13 [2021-06-12 19:56:32,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,590 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 17 treesize of output 13 [2021-06-12 19:56:32,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,659 INFO L628 ElimStorePlain]: treesize reduction 18, result has 85.8 percent of original size [2021-06-12 19:56:32,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:32,661 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:109 [2021-06-12 19:56:32,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:32,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:32,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:32,752 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:32,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,789 INFO L628 ElimStorePlain]: treesize reduction 73, result has 36.5 percent of original size [2021-06-12 19:56:32,790 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1081 vanished before elimination [2021-06-12 19:56:32,790 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:32,790 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:32,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:32,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:32,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:32,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1080 vanished before elimination [2021-06-12 19:56:32,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:32,802 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:187, output treesize:26 [2021-06-12 19:56:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774764868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:32,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:32,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222822994] [2021-06-12 19:56:32,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:32,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:32,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:32,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:32,832 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) [2021-06-12 19:56:33,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:33,502 INFO L93 Difference]: Finished difference Result 269 states and 760 transitions. [2021-06-12 19:56:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:33,503 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 [2021-06-12 19:56:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:33,503 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:56:33,503 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:56:33,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 746.6ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:33,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:56:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 219. [2021-06-12 19:56:33,505 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) [2021-06-12 19:56:33,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:56:33,506 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:56:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:33,506 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:56:33,506 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) [2021-06-12 19:56:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:56:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:33,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:33,506 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:33,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4296 [2021-06-12 19:56:33,707 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:33,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1455215452, now seen corresponding path program 117 times [2021-06-12 19:56:33,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:33,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740455428] [2021-06-12 19:56:33,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:34,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:34,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740455428] [2021-06-12 19:56:34,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740455428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:34,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814379231] [2021-06-12 19:56:34,031 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 [2021-06-12 19:56:34,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:34,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,168 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 [2021-06-12 19:56:34,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,172 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 15 treesize of output 11 [2021-06-12 19:56:34,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:34,175 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 35 treesize of output 27 [2021-06-12 19:56:34,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:34,179 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 25 treesize of output 19 [2021-06-12 19:56:34,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:34,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:195, output treesize:251 [2021-06-12 19:56:34,466 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 27 treesize of output 21 [2021-06-12 19:56:34,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:34,520 INFO L628 ElimStorePlain]: treesize reduction 114, result has 47.0 percent of original size [2021-06-12 19:56:34,522 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 [2021-06-12 19:56:34,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:34,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,548 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1083 vanished before elimination [2021-06-12 19:56:34,550 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 27 treesize of output 21 [2021-06-12 19:56:34,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,552 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 27 treesize of output 21 [2021-06-12 19:56:34,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:34,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:34,574 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1085 vanished before elimination [2021-06-12 19:56:34,574 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:34,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:34,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:228, output treesize:52 [2021-06-12 19:56:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:34,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814379231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:34,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:34,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:34,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465818725] [2021-06-12 19:56:34,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:34,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:34,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:34,617 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) [2021-06-12 19:56:35,026 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-12 19:56:35,259 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 19:56:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:35,343 INFO L93 Difference]: Finished difference Result 259 states and 751 transitions. [2021-06-12 19:56:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:35,343 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 [2021-06-12 19:56:35,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:35,343 INFO L225 Difference]: With dead ends: 259 [2021-06-12 19:56:35,344 INFO L226 Difference]: Without dead ends: 255 [2021-06-12 19:56:35,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1057.7ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:35,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-12 19:56:35,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2021-06-12 19:56:35,346 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) [2021-06-12 19:56:35,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-12 19:56:35,346 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-12 19:56:35,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:35,346 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-12 19:56:35,346 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) [2021-06-12 19:56:35,346 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-12 19:56:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:35,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:35,347 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:35,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:35,547 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:35,547 INFO L82 PathProgramCache]: Analyzing trace with hash 640409298, now seen corresponding path program 118 times [2021-06-12 19:56:35,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:35,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541597857] [2021-06-12 19:56:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:35,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541597857] [2021-06-12 19:56:35,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541597857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:35,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73127718] [2021-06-12 19:56:35,784 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 [2021-06-12 19:56:35,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:35,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:56:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:35,902 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 [2021-06-12 19:56:35,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,906 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 25 treesize of output 19 [2021-06-12 19:56:35,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:35,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:35,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:35,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:35,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:35,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:35,991 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:156, output treesize:146 [2021-06-12 19:56:36,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,075 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 35 treesize of output 27 [2021-06-12 19:56:36,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,080 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 38 treesize of output 30 [2021-06-12 19:56:36,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,084 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 35 treesize of output 27 [2021-06-12 19:56:36,085 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,090 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 [2021-06-12 19:56:36,091 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,095 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 19 treesize of output 15 [2021-06-12 19:56:36,096 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,100 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 29 treesize of output 23 [2021-06-12 19:56:36,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,105 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 [2021-06-12 19:56:36,106 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,109 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 25 treesize of output 19 [2021-06-12 19:56:36,110 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,114 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 [2021-06-12 19:56:36,115 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,118 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 [2021-06-12 19:56:36,119 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,285 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2021-06-12 19:56:36,286 INFO L628 ElimStorePlain]: treesize reduction 363, result has 38.3 percent of original size [2021-06-12 19:56:36,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,289 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 20 treesize of output 9 [2021-06-12 19:56:36,289 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,292 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 20 treesize of output 9 [2021-06-12 19:56:36,293 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,303 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 21 treesize of output 7 [2021-06-12 19:56:36,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,306 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 21 treesize of output 7 [2021-06-12 19:56:36,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,316 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 12 treesize of output 5 [2021-06-12 19:56:36,316 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,319 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 [2021-06-12 19:56:36,320 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,322 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 [2021-06-12 19:56:36,322 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:36,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:56:36,381 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:425, output treesize:146 [2021-06-12 19:56:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73127718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:36,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:36,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981875939] [2021-06-12 19:56:36,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:36,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:36,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:36,543 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) [2021-06-12 19:56:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:36,938 INFO L93 Difference]: Finished difference Result 256 states and 743 transitions. [2021-06-12 19:56:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:36,938 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 [2021-06-12 19:56:36,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:36,938 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:56:36,939 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:56:36,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:56:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-06-12 19:56:36,941 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) [2021-06-12 19:56:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:56:36,941 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:56:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:36,941 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:56:36,941 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) [2021-06-12 19:56:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:56:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:36,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:36,942 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:37,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4338,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:37,142 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:37,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1662308434, now seen corresponding path program 119 times [2021-06-12 19:56:37,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:37,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422202886] [2021-06-12 19:56:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:37,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:37,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422202886] [2021-06-12 19:56:37,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422202886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760483239] [2021-06-12 19:56:37,325 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 [2021-06-12 19:56:37,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:56:37,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:37,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:56:37,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:37,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,450 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 25 treesize of output 19 [2021-06-12 19:56:37,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,454 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 [2021-06-12 19:56:37,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,458 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 [2021-06-12 19:56:37,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,461 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 35 treesize of output 27 [2021-06-12 19:56:37,463 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:37,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:37,542 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:201, output treesize:261 [2021-06-12 19:56:37,868 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1092, v_prenex_1094, array_2, v_prenex_1096, v_prenex_1088, v_prenex_1098, v_prenex_1100, v_prenex_1090], 1=[v_prenex_1093, v_prenex_1095, v_prenex_1097, v_prenex_1099, array_4, v_prenex_1101, v_prenex_1089, v_prenex_1091]} [2021-06-12 19:56:37,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:37,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,881 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 [2021-06-12 19:56:37,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,178 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 88 [2021-06-12 19:56:38,179 INFO L628 ElimStorePlain]: treesize reduction 405, result has 49.6 percent of original size [2021-06-12 19:56:38,183 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 27 treesize of output 21 [2021-06-12 19:56:38,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:38,397 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-06-12 19:56:38,397 INFO L628 ElimStorePlain]: treesize reduction 33, result has 91.9 percent of original size [2021-06-12 19:56:38,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:38,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:38,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,578 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-06-12 19:56:38,579 INFO L628 ElimStorePlain]: treesize reduction 77, result has 78.6 percent of original size [2021-06-12 19:56:38,583 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 27 treesize of output 21 [2021-06-12 19:56:38,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:38,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1088 vanished before elimination [2021-06-12 19:56:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:38,674 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:38,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:38,682 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,765 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1100 vanished before elimination [2021-06-12 19:56:38,768 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 7 treesize of output 5 [2021-06-12 19:56:38,769 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,846 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1093 vanished before elimination [2021-06-12 19:56:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,850 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 10 treesize of output 5 [2021-06-12 19:56:38,851 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,853 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 20 treesize of output 9 [2021-06-12 19:56:38,854 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:38,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:38,939 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 21 treesize of output 7 [2021-06-12 19:56:38,939 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,942 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 11 treesize of output 3 [2021-06-12 19:56:38,943 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:38,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,026 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 12 treesize of output 5 [2021-06-12 19:56:39,026 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,029 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 44 treesize of output 19 [2021-06-12 19:56:39,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,033 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 12 treesize of output 5 [2021-06-12 19:56:39,033 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,107 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 11 treesize of output 3 [2021-06-12 19:56:39,108 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,110 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 [2021-06-12 19:56:39,111 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1101 vanished before elimination [2021-06-12 19:56:39,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1089 vanished before elimination [2021-06-12 19:56:39,179 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1091 vanished before elimination [2021-06-12 19:56:39,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:39,181 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 16 variables, input treesize:817, output treesize:168 [2021-06-12 19:56:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760483239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:39,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-12 19:56:39,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798030994] [2021-06-12 19:56:39,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:39,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:39,380 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) [2021-06-12 19:56:39,782 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-12 19:56:40,160 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 90 [2021-06-12 19:56:40,487 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 19:56:40,664 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 19:56:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:40,765 INFO L93 Difference]: Finished difference Result 281 states and 802 transitions. [2021-06-12 19:56:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:40,765 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 [2021-06-12 19:56:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:40,765 INFO L225 Difference]: With dead ends: 281 [2021-06-12 19:56:40,766 INFO L226 Difference]: Without dead ends: 269 [2021-06-12 19:56:40,766 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1657.1ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-12 19:56:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2021-06-12 19:56:40,768 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) [2021-06-12 19:56:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-12 19:56:40,768 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-12 19:56:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:40,768 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-12 19:56:40,768 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) [2021-06-12 19:56:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-12 19:56:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:40,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:40,769 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:40,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4360 [2021-06-12 19:56:40,969 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2004891946, now seen corresponding path program 120 times [2021-06-12 19:56:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:40,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378923936] [2021-06-12 19:56:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:41,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378923936] [2021-06-12 19:56:41,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378923936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415034500] [2021-06-12 19:56:41,103 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 [2021-06-12 19:56:41,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:41,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:41,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:41,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:41,194 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 27 treesize of output 21 [2021-06-12 19:56:41,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:41,197 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 15 treesize of output 11 [2021-06-12 19:56:41,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,200 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 [2021-06-12 19:56:41,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,203 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 17 treesize of output 13 [2021-06-12 19:56:41,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:41,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:113 [2021-06-12 19:56:41,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,301 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 38 treesize of output 30 [2021-06-12 19:56:41,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:41,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,306 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 [2021-06-12 19:56:41,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,311 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 [2021-06-12 19:56:41,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:41,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,319 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 [2021-06-12 19:56:41,319 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,323 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 29 treesize of output 23 [2021-06-12 19:56:41,324 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:41,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,328 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 27 treesize of output 21 [2021-06-12 19:56:41,329 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:41,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:41,333 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,336 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 [2021-06-12 19:56:41,337 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,340 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 28 treesize of output 22 [2021-06-12 19:56:41,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,466 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-12 19:56:41,466 INFO L628 ElimStorePlain]: treesize reduction 236, result has 45.7 percent of original size [2021-06-12 19:56:41,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,470 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 11 treesize of output 3 [2021-06-12 19:56:41,470 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,473 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 21 treesize of output 7 [2021-06-12 19:56:41,474 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,484 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 20 treesize of output 9 [2021-06-12 19:56:41,484 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,487 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 [2021-06-12 19:56:41,488 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,497 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 24 treesize of output 9 [2021-06-12 19:56:41,498 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:41,500 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 12 treesize of output 5 [2021-06-12 19:56:41,501 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,510 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 11 treesize of output 3 [2021-06-12 19:56:41,510 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:41,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:41,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:41,560 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 2 variables, input treesize:397, output treesize:125 [2021-06-12 19:56:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:41,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415034500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:41,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:41,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 19:56:41,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942618924] [2021-06-12 19:56:41,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:41,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:41,687 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) [2021-06-12 19:56:42,098 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:56:42,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:42,153 INFO L93 Difference]: Finished difference Result 256 states and 743 transitions. [2021-06-12 19:56:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:56:42,153 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 [2021-06-12 19:56:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:42,154 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:56:42,154 INFO L226 Difference]: Without dead ends: 252 [2021-06-12 19:56:42,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-12 19:56:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 219. [2021-06-12 19:56:42,156 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) [2021-06-12 19:56:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:56:42,156 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:56:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:42,156 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:56:42,157 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) [2021-06-12 19:56:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:56:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:42,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:42,157 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:42,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4395,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:42,361 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:42,361 INFO L82 PathProgramCache]: Analyzing trace with hash 569417172, now seen corresponding path program 121 times [2021-06-12 19:56:42,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:42,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385358017] [2021-06-12 19:56:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:42,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385358017] [2021-06-12 19:56:42,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385358017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597501319] [2021-06-12 19:56:42,587 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 [2021-06-12 19:56:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:42,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:42,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:42,693 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 [2021-06-12 19:56:42,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:42,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:42,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:42,700 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,702 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 17 treesize of output 13 [2021-06-12 19:56:42,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:42,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:42,731 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:111 [2021-06-12 19:56:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,813 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 27 treesize of output 21 [2021-06-12 19:56:42,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:42,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,818 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 17 treesize of output 13 [2021-06-12 19:56:42,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,822 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 27 treesize of output 21 [2021-06-12 19:56:42,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,825 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 28 treesize of output 22 [2021-06-12 19:56:42,826 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:42,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,830 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 18 treesize of output 14 [2021-06-12 19:56:42,830 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,834 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 35 treesize of output 27 [2021-06-12 19:56:42,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:42,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,838 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 37 treesize of output 29 [2021-06-12 19:56:42,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,843 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 [2021-06-12 19:56:42,843 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,847 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 25 treesize of output 19 [2021-06-12 19:56:42,847 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,851 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 [2021-06-12 19:56:42,851 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,996 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2021-06-12 19:56:42,996 INFO L628 ElimStorePlain]: treesize reduction 200, result has 54.8 percent of original size [2021-06-12 19:56:43,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,000 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 10 treesize of output 5 [2021-06-12 19:56:43,000 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,003 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 [2021-06-12 19:56:43,004 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,007 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 21 treesize of output 7 [2021-06-12 19:56:43,008 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,011 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 11 treesize of output 3 [2021-06-12 19:56:43,011 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:56:43,021 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,024 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 [2021-06-12 19:56:43,025 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,028 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 12 treesize of output 5 [2021-06-12 19:56:43,028 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:43,040 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 [2021-06-12 19:56:43,041 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,043 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 [2021-06-12 19:56:43,043 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:43,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:43,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:43,113 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 2 variables, input treesize:343, output treesize:143 [2021-06-12 19:56:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:43,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597501319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:43,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:43,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:43,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542952743] [2021-06-12 19:56:43,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:43,240 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) [2021-06-12 19:56:43,835 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2021-06-12 19:56:44,008 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 19:56:44,267 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-06-12 19:56:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:44,312 INFO L93 Difference]: Finished difference Result 288 states and 828 transitions. [2021-06-12 19:56:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:44,312 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 [2021-06-12 19:56:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:44,313 INFO L225 Difference]: With dead ends: 288 [2021-06-12 19:56:44,313 INFO L226 Difference]: Without dead ends: 280 [2021-06-12 19:56:44,313 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1151.7ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:56:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-12 19:56:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 223. [2021-06-12 19:56:44,315 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) [2021-06-12 19:56:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 660 transitions. [2021-06-12 19:56:44,315 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 660 transitions. Word has length 17 [2021-06-12 19:56:44,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:44,316 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 660 transitions. [2021-06-12 19:56:44,316 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) [2021-06-12 19:56:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 660 transitions. [2021-06-12 19:56:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:44,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:44,316 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:44,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4414,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:44,516 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:44,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash -245388982, now seen corresponding path program 122 times [2021-06-12 19:56:44,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:44,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467407554] [2021-06-12 19:56:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:44,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:44,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:44,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467407554] [2021-06-12 19:56:44,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467407554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635557870] [2021-06-12 19:56:44,754 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 [2021-06-12 19:56:44,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:44,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:44,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:44,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:44,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:44,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:44,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,887 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 [2021-06-12 19:56:44,888 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:44,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:44,936 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. [2021-06-12 19:56:44,936 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:151, output treesize:123 [2021-06-12 19:56:45,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,050 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 [2021-06-12 19:56:45,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,055 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 [2021-06-12 19:56:45,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:45,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,061 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 25 treesize of output 19 [2021-06-12 19:56:45,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,066 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 15 treesize of output 11 [2021-06-12 19:56:45,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,072 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 19 treesize of output 15 [2021-06-12 19:56:45,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,077 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 29 treesize of output 23 [2021-06-12 19:56:45,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:45,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,082 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 17 treesize of output 13 [2021-06-12 19:56:45,083 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,087 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 17 treesize of output 13 [2021-06-12 19:56:45,088 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,291 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-06-12 19:56:45,291 INFO L628 ElimStorePlain]: treesize reduction 43, result has 87.0 percent of original size [2021-06-12 19:56:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,296 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 [2021-06-12 19:56:45,296 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,300 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 [2021-06-12 19:56:45,301 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,305 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 24 treesize of output 9 [2021-06-12 19:56:45,305 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,317 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 10 treesize of output 5 [2021-06-12 19:56:45,318 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,322 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 20 treesize of output 9 [2021-06-12 19:56:45,322 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,333 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 11 treesize of output 3 [2021-06-12 19:56:45,334 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,338 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 9 treesize of output 3 [2021-06-12 19:56:45,338 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,342 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 21 treesize of output 7 [2021-06-12 19:56:45,343 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,346 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 11 treesize of output 3 [2021-06-12 19:56:45,347 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:45,443 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 6 variables, input treesize:333, output treesize:152 [2021-06-12 19:56:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635557870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:45,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 19:56:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526712102] [2021-06-12 19:56:45,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:56:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:56:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:56:45,614 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) [2021-06-12 19:56:46,084 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 19:56:46,250 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-06-12 19:56:46,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:46,302 INFO L93 Difference]: Finished difference Result 274 states and 795 transitions. [2021-06-12 19:56:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:46,303 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 [2021-06-12 19:56:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:46,303 INFO L225 Difference]: With dead ends: 274 [2021-06-12 19:56:46,303 INFO L226 Difference]: Without dead ends: 270 [2021-06-12 19:56:46,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 923.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:46,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-12 19:56:46,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 221. [2021-06-12 19:56:46,305 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) [2021-06-12 19:56:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 654 transitions. [2021-06-12 19:56:46,306 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 654 transitions. Word has length 17 [2021-06-12 19:56:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:46,306 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 654 transitions. [2021-06-12 19:56:46,306 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) [2021-06-12 19:56:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 654 transitions. [2021-06-12 19:56:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:46,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:46,306 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:46,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-12 19:56:46,507 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:46,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:46,507 INFO L82 PathProgramCache]: Analyzing trace with hash 344982116, now seen corresponding path program 123 times [2021-06-12 19:56:46,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:46,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451759363] [2021-06-12 19:56:46,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:46,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451759363] [2021-06-12 19:56:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451759363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:46,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822740085] [2021-06-12 19:56:46,641 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 [2021-06-12 19:56:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:46,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:56:46,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:46,730 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 19 treesize of output 15 [2021-06-12 19:56:46,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,733 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 17 treesize of output 13 [2021-06-12 19:56:46,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,735 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 15 treesize of output 11 [2021-06-12 19:56:46,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:46,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:46,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:87, output treesize:59 [2021-06-12 19:56:46,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,833 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 25 treesize of output 19 [2021-06-12 19:56:46,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,836 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 19 treesize of output 15 [2021-06-12 19:56:46,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,840 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 15 treesize of output 11 [2021-06-12 19:56:46,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,843 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 27 treesize of output 21 [2021-06-12 19:56:46,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:46,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,847 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 29 treesize of output 23 [2021-06-12 19:56:46,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:46,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:46,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,854 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 17 treesize of output 13 [2021-06-12 19:56:46,854 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,857 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 27 treesize of output 21 [2021-06-12 19:56:46,858 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:46,963 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-06-12 19:56:46,963 INFO L628 ElimStorePlain]: treesize reduction 58, result has 75.9 percent of original size [2021-06-12 19:56:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,966 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 24 treesize of output 9 [2021-06-12 19:56:46,967 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,970 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 12 treesize of output 5 [2021-06-12 19:56:46,970 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,980 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 11 treesize of output 3 [2021-06-12 19:56:46,980 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,983 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 20 treesize of output 9 [2021-06-12 19:56:46,984 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,986 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 10 treesize of output 5 [2021-06-12 19:56:46,987 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:46,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:46,996 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 11 treesize of output 3 [2021-06-12 19:56:46,997 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:46,999 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 [2021-06-12 19:56:47,000 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:47,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:47,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:47,054 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:269, output treesize:115 [2021-06-12 19:56:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:47,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822740085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:47,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:47,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:56:47,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533633434] [2021-06-12 19:56:47,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:47,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:47,174 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) [2021-06-12 19:56:47,746 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 19:56:47,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:47,800 INFO L93 Difference]: Finished difference Result 308 states and 888 transitions. [2021-06-12 19:56:47,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:56:47,800 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 [2021-06-12 19:56:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:47,800 INFO L225 Difference]: With dead ends: 308 [2021-06-12 19:56:47,800 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:56:47,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 716.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:56:47,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 219. [2021-06-12 19:56:47,803 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) [2021-06-12 19:56:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 648 transitions. [2021-06-12 19:56:47,803 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 648 transitions. Word has length 17 [2021-06-12 19:56:47,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:47,803 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 648 transitions. [2021-06-12 19:56:47,803 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) [2021-06-12 19:56:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 648 transitions. [2021-06-12 19:56:47,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:47,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:47,804 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:48,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-12 19:56:48,004 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:48,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:48,004 INFO L82 PathProgramCache]: Analyzing trace with hash -109288126, now seen corresponding path program 124 times [2021-06-12 19:56:48,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:48,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972590093] [2021-06-12 19:56:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972590093] [2021-06-12 19:56:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972590093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578337970] [2021-06-12 19:56:48,293 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 [2021-06-12 19:56:48,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:48,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:48,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:48,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,440 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 35 treesize of output 27 [2021-06-12 19:56:48,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:48,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,444 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 15 treesize of output 11 [2021-06-12 19:56:48,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,448 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 [2021-06-12 19:56:48,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,452 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 25 treesize of output 19 [2021-06-12 19:56:48,453 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:48,508 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-12 19:56:48,616 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1109, array_2, v_prenex_1105, v_prenex_1107], 1=[v_prenex_1108, v_prenex_1110, array_4, v_prenex_1106]} [2021-06-12 19:56:48,620 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 [2021-06-12 19:56:48,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:48,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:48,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,634 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 30 treesize of output 24 [2021-06-12 19:56:48,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,639 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 48 treesize of output 38 [2021-06-12 19:56:48,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,644 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 30 treesize of output 24 [2021-06-12 19:56:48,645 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:48,650 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:48,654 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,791 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-12 19:56:48,791 INFO L628 ElimStorePlain]: treesize reduction 180, result has 55.6 percent of original size [2021-06-12 19:56:48,795 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 [2021-06-12 19:56:48,795 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:48,855 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:48,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,926 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 27 treesize of output 21 [2021-06-12 19:56:48,927 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:48,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:48,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,994 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 [2021-06-12 19:56:48,995 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,998 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 [2021-06-12 19:56:48,999 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,073 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 12 treesize of output 5 [2021-06-12 19:56:49,074 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,077 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 11 treesize of output 3 [2021-06-12 19:56:49,078 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,081 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 21 treesize of output 7 [2021-06-12 19:56:49,081 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,084 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 12 treesize of output 5 [2021-06-12 19:56:49,085 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,087 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 44 treesize of output 19 [2021-06-12 19:56:49,088 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,148 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:49,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:49,151 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 10 treesize of output 5 [2021-06-12 19:56:49,152 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,154 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 [2021-06-12 19:56:49,155 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:49,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:49,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:49,222 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:56:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:49,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578337970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:49,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:49,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:49,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396652140] [2021-06-12 19:56:49,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:49,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:49,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:49,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:49,363 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) [2021-06-12 19:56:49,918 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2021-06-12 19:56:50,172 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2021-06-12 19:56:50,351 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-06-12 19:56:50,553 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-06-12 19:56:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:50,642 INFO L93 Difference]: Finished difference Result 302 states and 863 transitions. [2021-06-12 19:56:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:56:50,642 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 [2021-06-12 19:56:50,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:50,643 INFO L225 Difference]: With dead ends: 302 [2021-06-12 19:56:50,643 INFO L226 Difference]: Without dead ends: 294 [2021-06-12 19:56:50,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1432.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-06-12 19:56:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 224. [2021-06-12 19:56:50,645 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) [2021-06-12 19:56:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 663 transitions. [2021-06-12 19:56:50,646 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 663 transitions. Word has length 17 [2021-06-12 19:56:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:50,646 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 663 transitions. [2021-06-12 19:56:50,646 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) [2021-06-12 19:56:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 663 transitions. [2021-06-12 19:56:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:50,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:50,646 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:50,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4467,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:50,847 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash 233295386, now seen corresponding path program 125 times [2021-06-12 19:56:50,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:50,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087582014] [2021-06-12 19:56:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:50,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087582014] [2021-06-12 19:56:50,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087582014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385701408] [2021-06-12 19:56:50,976 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 [2021-06-12 19:56:51,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:51,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:51,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,097 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 17 treesize of output 13 [2021-06-12 19:56:51,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,101 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 25 treesize of output 19 [2021-06-12 19:56:51,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,105 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 [2021-06-12 19:56:51,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,108 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 27 treesize of output 21 [2021-06-12 19:56:51,109 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:51,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:51,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:56:51,287 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1120, v_prenex_1112, v_prenex_1122, v_prenex_1114, v_prenex_1124, v_prenex_1116, v_prenex_1118], 1=[v_prenex_1119, array_0, v_prenex_1121, v_prenex_1123, v_prenex_1111, v_prenex_1113, v_prenex_1115, v_prenex_1117]} [2021-06-12 19:56:51,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:51,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,465 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 80 [2021-06-12 19:56:51,465 INFO L628 ElimStorePlain]: treesize reduction 88, result has 76.0 percent of original size [2021-06-12 19:56:51,469 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 7 treesize of output 5 [2021-06-12 19:56:51,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,616 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 19:56:51,616 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.4 percent of original size [2021-06-12 19:56:51,619 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 27 treesize of output 21 [2021-06-12 19:56:51,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:51,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:51,696 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1122 vanished before elimination [2021-06-12 19:56:51,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:51,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:51,862 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-12 19:56:51,863 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.0 percent of original size [2021-06-12 19:56:51,863 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1124 vanished before elimination [2021-06-12 19:56:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:51,867 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,871 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 38 treesize of output 30 [2021-06-12 19:56:51,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:52,035 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 19:56:52,036 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.5 percent of original size [2021-06-12 19:56:52,040 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 28 treesize of output 22 [2021-06-12 19:56:52,040 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,044 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 19 treesize of output 15 [2021-06-12 19:56:52,045 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,123 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1119 vanished before elimination [2021-06-12 19:56:52,123 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:56:52,123 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1121 vanished before elimination [2021-06-12 19:56:52,123 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1123 vanished before elimination [2021-06-12 19:56:52,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,127 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 20 treesize of output 9 [2021-06-12 19:56:52,127 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,130 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 10 treesize of output 5 [2021-06-12 19:56:52,131 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,216 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 11 treesize of output 3 [2021-06-12 19:56:52,216 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,220 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 [2021-06-12 19:56:52,220 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,304 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 12 treesize of output 5 [2021-06-12 19:56:52,305 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,308 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 12 treesize of output 5 [2021-06-12 19:56:52,309 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,312 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 44 treesize of output 19 [2021-06-12 19:56:52,312 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,395 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 11 treesize of output 3 [2021-06-12 19:56:52,395 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:52,398 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 21 treesize of output 7 [2021-06-12 19:56:52,399 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:52,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:52,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:52,470 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 16 variables, input treesize:374, output treesize:161 [2021-06-12 19:56:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:52,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385701408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:52,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:52,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:56:52,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831594466] [2021-06-12 19:56:52,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:52,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:52,635 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) [2021-06-12 19:56:53,107 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-12 19:56:53,281 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-12 19:56:53,574 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 19:56:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:53,613 INFO L93 Difference]: Finished difference Result 285 states and 824 transitions. [2021-06-12 19:56:53,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:53,613 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 [2021-06-12 19:56:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:53,613 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:56:53,613 INFO L226 Difference]: Without dead ends: 277 [2021-06-12 19:56:53,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1044.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-12 19:56:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 224. [2021-06-12 19:56:53,616 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) [2021-06-12 19:56:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 663 transitions. [2021-06-12 19:56:53,616 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 663 transitions. Word has length 17 [2021-06-12 19:56:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:53,616 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 663 transitions. [2021-06-12 19:56:53,616 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) [2021-06-12 19:56:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 663 transitions. [2021-06-12 19:56:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:53,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:53,617 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:53,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-06-12 19:56:53,817 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1313469832, now seen corresponding path program 126 times [2021-06-12 19:56:53,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:53,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871728961] [2021-06-12 19:56:53,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:53,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:53,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871728961] [2021-06-12 19:56:53,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871728961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:53,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491552901] [2021-06-12 19:56:53,998 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 [2021-06-12 19:56:54,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:56:54,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:54,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:54,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:54,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,178 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 [2021-06-12 19:56:54,179 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:54,243 INFO L628 ElimStorePlain]: treesize reduction 52, result has 61.5 percent of original size [2021-06-12 19:56:54,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:54,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,269 INFO L628 ElimStorePlain]: treesize reduction 26, result has 65.8 percent of original size [2021-06-12 19:56:54,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:56:54,270 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:131, output treesize:50 [2021-06-12 19:56:54,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:54,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:54,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,328 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:56:54,330 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 19 treesize of output 15 [2021-06-12 19:56:54,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,332 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 21 treesize of output 17 [2021-06-12 19:56:54,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,348 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1126 vanished before elimination [2021-06-12 19:56:54,350 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 17 treesize of output 13 [2021-06-12 19:56:54,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,352 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 19 treesize of output 15 [2021-06-12 19:56:54,353 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,371 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2021-06-12 19:56:54,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1128 vanished before elimination [2021-06-12 19:56:54,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:56:54,372 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:104, output treesize:26 [2021-06-12 19:56:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:54,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491552901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:54,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:56:54,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848958048] [2021-06-12 19:56:54,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:54,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:54,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:54,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:54,406 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) [2021-06-12 19:56:55,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:55,277 INFO L93 Difference]: Finished difference Result 332 states and 941 transitions. [2021-06-12 19:56:55,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:56:55,277 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 [2021-06-12 19:56:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:55,277 INFO L225 Difference]: With dead ends: 332 [2021-06-12 19:56:55,277 INFO L226 Difference]: Without dead ends: 324 [2021-06-12 19:56:55,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 861.8ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:56:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-12 19:56:55,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 226. [2021-06-12 19:56:55,280 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) [2021-06-12 19:56:55,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 672 transitions. [2021-06-12 19:56:55,280 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 672 transitions. Word has length 17 [2021-06-12 19:56:55,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:55,280 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 672 transitions. [2021-06-12 19:56:55,280 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) [2021-06-12 19:56:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 672 transitions. [2021-06-12 19:56:55,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:55,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:55,281 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:55,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4514,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:55,481 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1873488734, now seen corresponding path program 127 times [2021-06-12 19:56:55,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:55,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781657773] [2021-06-12 19:56:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:55,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:55,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:55,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781657773] [2021-06-12 19:56:55,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781657773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:55,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667816790] [2021-06-12 19:56:55,646 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 [2021-06-12 19:56:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:55,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:55,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,731 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 [2021-06-12 19:56:55,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,735 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 15 treesize of output 11 [2021-06-12 19:56:55,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,738 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 [2021-06-12 19:56:55,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:55,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:55,742 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 [2021-06-12 19:56:55,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:55,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:55,780 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-12 19:56:55,927 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1131, v_prenex_1133, v_prenex_1135], 1=[array_0, v_prenex_1130, v_prenex_1132, v_prenex_1134]} [2021-06-12 19:56:55,931 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 29 treesize of output 23 [2021-06-12 19:56:55,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:55,936 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 28 treesize of output 22 [2021-06-12 19:56:55,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:55,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:55,946 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 38 treesize of output 30 [2021-06-12 19:56:55,947 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:56,148 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 19:56:56,148 INFO L628 ElimStorePlain]: treesize reduction 88, result has 78.4 percent of original size [2021-06-12 19:56:56,152 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 17 treesize of output 13 [2021-06-12 19:56:56,153 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,157 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 [2021-06-12 19:56:56,158 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:56,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:56,255 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,420 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-12 19:56:56,421 INFO L628 ElimStorePlain]: treesize reduction 26, result has 91.7 percent of original size [2021-06-12 19:56:56,424 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 27 treesize of output 21 [2021-06-12 19:56:56,425 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:56,582 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2021-06-12 19:56:56,583 INFO L628 ElimStorePlain]: treesize reduction 39, result has 87.0 percent of original size [2021-06-12 19:56:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,587 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 12 treesize of output 5 [2021-06-12 19:56:56,587 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,591 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 44 treesize of output 19 [2021-06-12 19:56:56,592 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,606 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 12 treesize of output 5 [2021-06-12 19:56:56,607 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,611 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 11 treesize of output 3 [2021-06-12 19:56:56,611 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,614 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 [2021-06-12 19:56:56,615 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,691 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 10 treesize of output 5 [2021-06-12 19:56:56,692 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,694 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 20 treesize of output 9 [2021-06-12 19:56:56,695 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,771 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1132 vanished before elimination [2021-06-12 19:56:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,775 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 21 treesize of output 7 [2021-06-12 19:56:56,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:56,778 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 [2021-06-12 19:56:56,779 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:56,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:56,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:56:56,856 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-12 19:56:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667816790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:57,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:56:57,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889072124] [2021-06-12 19:56:57,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:56:57,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:57,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:56:57,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:56:57,022 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) [2021-06-12 19:56:57,510 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 19:56:57,769 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-06-12 19:56:58,061 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-06-12 19:56:58,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:58,104 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-06-12 19:56:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:56:58,104 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 [2021-06-12 19:56:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:58,104 INFO L225 Difference]: With dead ends: 328 [2021-06-12 19:56:58,105 INFO L226 Difference]: Without dead ends: 320 [2021-06-12 19:56:58,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1185.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-12 19:56:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 225. [2021-06-12 19:56:58,107 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) [2021-06-12 19:56:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 670 transitions. [2021-06-12 19:56:58,107 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 670 transitions. Word has length 17 [2021-06-12 19:56:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:58,107 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 670 transitions. [2021-06-12 19:56:58,107 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) [2021-06-12 19:56:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 670 transitions. [2021-06-12 19:56:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:58,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:58,108 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:58,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4540 [2021-06-12 19:56:58,308 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash -684833076, now seen corresponding path program 128 times [2021-06-12 19:56:58,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:58,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107313985] [2021-06-12 19:56:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:58,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107313985] [2021-06-12 19:56:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107313985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:58,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595608500] [2021-06-12 19:56:58,561 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 [2021-06-12 19:56:58,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:58,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:58,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:56:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,685 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 [2021-06-12 19:56:58,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,688 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 [2021-06-12 19:56:58,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:58,691 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 [2021-06-12 19:56:58,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,694 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 35 treesize of output 27 [2021-06-12 19:56:58,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:56:58,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:58,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:56:58,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:195 [2021-06-12 19:56:58,920 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-12 19:56:58,924 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 30 treesize of output 24 [2021-06-12 19:56:58,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,928 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 25 treesize of output 19 [2021-06-12 19:56:58,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:58,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,936 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 30 treesize of output 24 [2021-06-12 19:56:58,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,940 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 28 treesize of output 22 [2021-06-12 19:56:58,941 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,945 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 [2021-06-12 19:56:58,945 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:58,950 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:58,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:56:58,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:56:58,958 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,962 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 25 treesize of output 19 [2021-06-12 19:56:58,962 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,966 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 28 treesize of output 22 [2021-06-12 19:56:58,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,970 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 [2021-06-12 19:56:58,971 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:58,974 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 27 treesize of output 21 [2021-06-12 19:56:58,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2021-06-12 19:56:58,978 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 48 treesize of output 38 [2021-06-12 19:56:58,979 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,124 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-06-12 19:56:59,124 INFO L628 ElimStorePlain]: treesize reduction 187, result has 56.0 percent of original size [2021-06-12 19:56:59,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,128 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 12 treesize of output 5 [2021-06-12 19:56:59,128 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,131 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 11 treesize of output 3 [2021-06-12 19:56:59,132 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,135 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 12 treesize of output 5 [2021-06-12 19:56:59,135 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,138 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 [2021-06-12 19:56:59,139 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,142 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 11 treesize of output 3 [2021-06-12 19:56:59,142 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:59,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,152 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 21 treesize of output 7 [2021-06-12 19:56:59,153 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,156 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 10 treesize of output 5 [2021-06-12 19:56:59,157 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:59,160 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 9 [2021-06-12 19:56:59,160 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:59,169 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 44 treesize of output 19 [2021-06-12 19:56:59,170 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:59,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:59,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:56:59,230 INFO L247 ElimStorePlain]: Needed 24 recursive calls to eliminate 2 variables, input treesize:521, output treesize:139 [2021-06-12 19:56:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595608500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:59,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:59,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:56:59,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086660304] [2021-06-12 19:56:59,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:56:59,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:56:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:56:59,372 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) [2021-06-12 19:56:59,800 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-06-12 19:57:00,104 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2021-06-12 19:57:00,582 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 101 [2021-06-12 19:57:01,094 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 105 [2021-06-12 19:57:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:01,141 INFO L93 Difference]: Finished difference Result 375 states and 1083 transitions. [2021-06-12 19:57:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:01,142 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 [2021-06-12 19:57:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:01,142 INFO L225 Difference]: With dead ends: 375 [2021-06-12 19:57:01,143 INFO L226 Difference]: Without dead ends: 367 [2021-06-12 19:57:01,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1985.9ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-12 19:57:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 229. [2021-06-12 19:57:01,146 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) [2021-06-12 19:57:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-06-12 19:57:01,147 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 17 [2021-06-12 19:57:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:01,147 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-06-12 19:57:01,147 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) [2021-06-12 19:57:01,147 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-06-12 19:57:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:01,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:01,148 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:01,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4566 [2021-06-12 19:57:01,370 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:01,370 INFO L82 PathProgramCache]: Analyzing trace with hash 590115602, now seen corresponding path program 129 times [2021-06-12 19:57:01,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:01,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969259431] [2021-06-12 19:57:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:01,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969259431] [2021-06-12 19:57:01,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969259431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970626067] [2021-06-12 19:57:01,587 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 [2021-06-12 19:57:01,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:57:01,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:01,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:57:01,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,755 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 27 treesize of output 21 [2021-06-12 19:57:01,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:01,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,759 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 17 treesize of output 13 [2021-06-12 19:57:01,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,764 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 [2021-06-12 19:57:01,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,768 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 15 treesize of output 11 [2021-06-12 19:57:01,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:01,830 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. [2021-06-12 19:57:01,830 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:197, output treesize:187 [2021-06-12 19:57:02,174 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1141, array_2, v_prenex_1151, v_prenex_1143, v_prenex_1146, v_prenex_1148], 1=[v_prenex_1152, array_4, v_prenex_1142, v_prenex_1144, v_prenex_1147, v_prenex_1149]} [2021-06-12 19:57:02,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:02,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,185 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 15 treesize of output 11 [2021-06-12 19:57:02,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,336 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2021-06-12 19:57:02,337 INFO L628 ElimStorePlain]: treesize reduction 136, result has 61.7 percent of original size [2021-06-12 19:57:02,341 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 30 treesize of output 24 [2021-06-12 19:57:02,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,346 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 28 treesize of output 22 [2021-06-12 19:57:02,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:02,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:02,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:02,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:02,477 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,535 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 19 treesize of output 15 [2021-06-12 19:57:02,536 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,591 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 7 treesize of output 5 [2021-06-12 19:57:02,592 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,649 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 10 treesize of output 5 [2021-06-12 19:57:02,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,653 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 [2021-06-12 19:57:02,654 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,714 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 21 treesize of output 7 [2021-06-12 19:57:02,715 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,718 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 24 treesize of output 9 [2021-06-12 19:57:02,719 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1142 vanished before elimination [2021-06-12 19:57:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,770 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 11 treesize of output 3 [2021-06-12 19:57:02,770 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,773 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 12 treesize of output 5 [2021-06-12 19:57:02,774 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:02,824 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 11 treesize of output 3 [2021-06-12 19:57:02,825 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:02,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:02,871 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1149 vanished before elimination [2021-06-12 19:57:02,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 12 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 19:57:02,874 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 18 variables, input treesize:369, output treesize:62 [2021-06-12 19:57:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:02,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970626067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:02,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:57:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213921284] [2021-06-12 19:57:02,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:02,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:02,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:02,920 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) [2021-06-12 19:57:03,293 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-06-12 19:57:03,596 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 119 [2021-06-12 19:57:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:03,734 INFO L93 Difference]: Finished difference Result 321 states and 933 transitions. [2021-06-12 19:57:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:03,734 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 [2021-06-12 19:57:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:03,735 INFO L225 Difference]: With dead ends: 321 [2021-06-12 19:57:03,735 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 19:57:03,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:03,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 19:57:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 233. [2021-06-12 19:57:03,737 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) [2021-06-12 19:57:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 696 transitions. [2021-06-12 19:57:03,737 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 696 transitions. Word has length 17 [2021-06-12 19:57:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:03,738 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 696 transitions. [2021-06-12 19:57:03,738 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) [2021-06-12 19:57:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 696 transitions. [2021-06-12 19:57:03,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:03,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:03,738 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:03,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4583 [2021-06-12 19:57:03,938 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2005784494, now seen corresponding path program 130 times [2021-06-12 19:57:03,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:03,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030348015] [2021-06-12 19:57:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:04,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030348015] [2021-06-12 19:57:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030348015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184678147] [2021-06-12 19:57:04,132 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 [2021-06-12 19:57:04,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:04,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:04,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,279 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 [2021-06-12 19:57:04,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,282 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 25 treesize of output 19 [2021-06-12 19:57:04,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,286 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 [2021-06-12 19:57:04,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 19:57:04,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,290 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 25 treesize of output 19 [2021-06-12 19:57:04,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:04,351 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:219 [2021-06-12 19:57:04,455 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1153, v_prenex_1155, v_prenex_1157], 1=[v_prenex_1154, array_4, v_prenex_1156, v_prenex_1158]} [2021-06-12 19:57:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:04,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:04,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,475 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 30 treesize of output 24 [2021-06-12 19:57:04,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:04,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,485 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 46 treesize of output 36 [2021-06-12 19:57:04,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,490 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 28 treesize of output 22 [2021-06-12 19:57:04,491 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:04,496 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,500 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 28 treesize of output 22 [2021-06-12 19:57:04,501 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,669 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-06-12 19:57:04,669 INFO L628 ElimStorePlain]: treesize reduction 257, result has 49.2 percent of original size [2021-06-12 19:57:04,672 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 27 treesize of output 21 [2021-06-12 19:57:04,673 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:04,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,750 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 7 treesize of output 5 [2021-06-12 19:57:04,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:04,830 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:04,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,910 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 10 treesize of output 5 [2021-06-12 19:57:04,910 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,913 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 20 treesize of output 9 [2021-06-12 19:57:04,914 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:04,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:04,997 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 12 treesize of output 5 [2021-06-12 19:57:04,998 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,002 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 11 treesize of output 3 [2021-06-12 19:57:05,002 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,006 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 44 treesize of output 19 [2021-06-12 19:57:05,007 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,010 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 [2021-06-12 19:57:05,011 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,014 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 12 treesize of output 5 [2021-06-12 19:57:05,014 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,084 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1156 vanished before elimination [2021-06-12 19:57:05,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,087 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 [2021-06-12 19:57:05,088 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:05,090 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 [2021-06-12 19:57:05,091 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:05,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:05,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:57:05,164 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 8 variables, input treesize:563, output treesize:163 [2021-06-12 19:57:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184678147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:05,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:57:05,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134600255] [2021-06-12 19:57:05,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:05,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:05,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:05,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:05,329 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) [2021-06-12 19:57:05,775 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2021-06-12 19:57:06,023 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-06-12 19:57:06,321 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-06-12 19:57:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:06,357 INFO L93 Difference]: Finished difference Result 344 states and 985 transitions. [2021-06-12 19:57:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:06,357 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 [2021-06-12 19:57:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:06,357 INFO L225 Difference]: With dead ends: 344 [2021-06-12 19:57:06,357 INFO L226 Difference]: Without dead ends: 340 [2021-06-12 19:57:06,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1242.7ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-12 19:57:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 233. [2021-06-12 19:57:06,360 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) [2021-06-12 19:57:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 696 transitions. [2021-06-12 19:57:06,360 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 696 transitions. Word has length 17 [2021-06-12 19:57:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:06,360 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 696 transitions. [2021-06-12 19:57:06,361 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) [2021-06-12 19:57:06,361 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 696 transitions. [2021-06-12 19:57:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:06,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:06,361 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:06,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4623,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:06,561 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:06,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1746863934, now seen corresponding path program 131 times [2021-06-12 19:57:06,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:06,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193522319] [2021-06-12 19:57:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:06,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193522319] [2021-06-12 19:57:06,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193522319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214998502] [2021-06-12 19:57:06,769 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 [2021-06-12 19:57:06,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:06,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,942 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 [2021-06-12 19:57:06,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,947 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 [2021-06-12 19:57:06,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,952 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 [2021-06-12 19:57:06,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,956 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 27 treesize of output 21 [2021-06-12 19:57:06,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:07,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,010 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. [2021-06-12 19:57:07,010 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:177, output treesize:167 [2021-06-12 19:57:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,216 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 19 treesize of output 15 [2021-06-12 19:57:07,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,222 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 28 treesize of output 22 [2021-06-12 19:57:07,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,228 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 29 treesize of output 23 [2021-06-12 19:57:07,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:07,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,234 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 38 treesize of output 30 [2021-06-12 19:57:07,235 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:07,471 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-12 19:57:07,472 INFO L628 ElimStorePlain]: treesize reduction 98, result has 78.7 percent of original size [2021-06-12 19:57:07,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,476 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 [2021-06-12 19:57:07,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:07,482 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 [2021-06-12 19:57:07,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,588 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 19:57:07,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,593 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 12 treesize of output 5 [2021-06-12 19:57:07,594 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,598 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 24 treesize of output 9 [2021-06-12 19:57:07,599 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,611 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 11 treesize of output 3 [2021-06-12 19:57:07,612 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,616 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 46 treesize of output 15 [2021-06-12 19:57:07,617 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,621 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 24 treesize of output 9 [2021-06-12 19:57:07,622 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,637 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 [2021-06-12 19:57:07,638 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,739 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 19:57:07,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,743 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 7 treesize of output 5 [2021-06-12 19:57:07,744 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,845 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 19:57:07,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,850 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 21 treesize of output 7 [2021-06-12 19:57:07,851 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,855 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 11 treesize of output 3 [2021-06-12 19:57:07,856 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,867 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 9 treesize of output 3 [2021-06-12 19:57:07,868 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:07,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:07,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1164 vanished before elimination [2021-06-12 19:57:07,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:07,969 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 27 treesize of output 21 [2021-06-12 19:57:07,970 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:08,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:08,073 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 20 treesize of output 9 [2021-06-12 19:57:08,074 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,077 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 10 treesize of output 5 [2021-06-12 19:57:08,078 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:08,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:08,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:57:08,190 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 12 variables, input treesize:424, output treesize:170 [2021-06-12 19:57:08,331 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-12 19:57:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:08,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214998502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:08,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:08,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 19:57:08,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38328029] [2021-06-12 19:57:08,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:08,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:08,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:08,391 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) [2021-06-12 19:57:09,114 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 19:57:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:09,193 INFO L93 Difference]: Finished difference Result 336 states and 971 transitions. [2021-06-12 19:57:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:09,193 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 [2021-06-12 19:57:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:09,194 INFO L225 Difference]: With dead ends: 336 [2021-06-12 19:57:09,194 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 19:57:09,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1005.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 19:57:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 231. [2021-06-12 19:57:09,197 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) [2021-06-12 19:57:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 688 transitions. [2021-06-12 19:57:09,197 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 688 transitions. Word has length 17 [2021-06-12 19:57:09,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:09,197 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 688 transitions. [2021-06-12 19:57:09,197 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) [2021-06-12 19:57:09,197 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 688 transitions. [2021-06-12 19:57:09,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:09,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:09,197 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:09,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4641,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:09,398 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:09,398 INFO L82 PathProgramCache]: Analyzing trace with hash 932699114, now seen corresponding path program 132 times [2021-06-12 19:57:09,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:09,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501871215] [2021-06-12 19:57:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501871215] [2021-06-12 19:57:09,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501871215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948759906] [2021-06-12 19:57:09,522 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 [2021-06-12 19:57:09,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:09,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:09,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:09,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:09,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,657 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 [2021-06-12 19:57:09,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,661 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 25 treesize of output 19 [2021-06-12 19:57:09,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,665 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 [2021-06-12 19:57:09,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,669 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 27 treesize of output 21 [2021-06-12 19:57:09,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:09,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:09,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:09,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:157, output treesize:147 [2021-06-12 19:57:09,805 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1171, array_2, v_prenex_1173, v_prenex_1169], 1=[v_prenex_1170, v_prenex_1172, array_0, v_prenex_1168]} [2021-06-12 19:57:09,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:09,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:09,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:57:09,999 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-12 19:57:10,000 INFO L628 ElimStorePlain]: treesize reduction 153, result has 65.8 percent of original size [2021-06-12 19:57:10,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:10,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:10,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:10,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,017 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 38 treesize of output 30 [2021-06-12 19:57:10,018 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:10,189 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 19:57:10,189 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.7 percent of original size [2021-06-12 19:57:10,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:10,194 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,338 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-06-12 19:57:10,338 INFO L628 ElimStorePlain]: treesize reduction 33, result has 88.6 percent of original size [2021-06-12 19:57:10,341 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 27 treesize of output 21 [2021-06-12 19:57:10,342 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:10,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,425 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 21 treesize of output 7 [2021-06-12 19:57:10,426 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,429 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 21 treesize of output 7 [2021-06-12 19:57:10,430 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,508 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1172 vanished before elimination [2021-06-12 19:57:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,512 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 12 treesize of output 5 [2021-06-12 19:57:10,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,516 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 44 treesize of output 19 [2021-06-12 19:57:10,516 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,529 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 12 treesize of output 5 [2021-06-12 19:57:10,529 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,533 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 11 treesize of output 3 [2021-06-12 19:57:10,533 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,536 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 [2021-06-12 19:57:10,537 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,608 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 10 treesize of output 5 [2021-06-12 19:57:10,608 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:10,611 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 20 treesize of output 9 [2021-06-12 19:57:10,611 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:10,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:10,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:57:10,684 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-12 19:57:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:10,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948759906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:10,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:10,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:57:10,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276213574] [2021-06-12 19:57:10,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:10,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:10,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:10,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:10,849 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) [2021-06-12 19:57:11,273 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-06-12 19:57:11,483 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-12 19:57:11,741 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-12 19:57:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:11,775 INFO L93 Difference]: Finished difference Result 331 states and 957 transitions. [2021-06-12 19:57:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:11,775 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 [2021-06-12 19:57:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:11,776 INFO L225 Difference]: With dead ends: 331 [2021-06-12 19:57:11,776 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 19:57:11,776 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1054.0ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 19:57:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 227. [2021-06-12 19:57:11,778 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) [2021-06-12 19:57:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 676 transitions. [2021-06-12 19:57:11,778 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 676 transitions. Word has length 17 [2021-06-12 19:57:11,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:11,779 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 676 transitions. [2021-06-12 19:57:11,779 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) [2021-06-12 19:57:11,779 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 676 transitions. [2021-06-12 19:57:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:11,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:11,779 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:11,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4683 [2021-06-12 19:57:11,980 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2073250540, now seen corresponding path program 133 times [2021-06-12 19:57:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:11,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997112358] [2021-06-12 19:57:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:12,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997112358] [2021-06-12 19:57:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997112358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917774729] [2021-06-12 19:57:12,236 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 [2021-06-12 19:57:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:12,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:12,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:12,383 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 35 treesize of output 27 [2021-06-12 19:57:12,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 19:57:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:12,387 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 [2021-06-12 19:57:12,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:12,391 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 25 treesize of output 19 [2021-06-12 19:57:12,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,394 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 25 treesize of output 19 [2021-06-12 19:57:12,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:12,456 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:207 [2021-06-12 19:57:12,566 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1174, array_2, v_prenex_1176, v_prenex_1178], 1=[array_4, v_prenex_1175, v_prenex_1177, v_prenex_1179]} [2021-06-12 19:57:12,571 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 [2021-06-12 19:57:12,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,575 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 [2021-06-12 19:57:12,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:12,766 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 19:57:12,766 INFO L628 ElimStorePlain]: treesize reduction 191, result has 63.5 percent of original size [2021-06-12 19:57:12,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:12,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:12,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:12,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,950 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 30 treesize of output 24 [2021-06-12 19:57:12,951 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:12,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,958 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 48 treesize of output 38 [2021-06-12 19:57:12,959 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,963 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 30 treesize of output 24 [2021-06-12 19:57:12,964 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,967 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 28 treesize of output 22 [2021-06-12 19:57:12,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:57:12,971 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,105 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-12 19:57:13,106 INFO L628 ElimStorePlain]: treesize reduction 21, result has 92.1 percent of original size [2021-06-12 19:57:13,106 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:57:13,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,109 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 10 treesize of output 5 [2021-06-12 19:57:13,110 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,113 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 20 treesize of output 9 [2021-06-12 19:57:13,114 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,198 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 [2021-06-12 19:57:13,199 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,201 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 11 treesize of output 3 [2021-06-12 19:57:13,202 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,275 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 [2021-06-12 19:57:13,275 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,278 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 [2021-06-12 19:57:13,279 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,282 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 44 treesize of output 19 [2021-06-12 19:57:13,283 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:13,285 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 12 treesize of output 5 [2021-06-12 19:57:13,286 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,288 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 [2021-06-12 19:57:13,289 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:13,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:13,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:57:13,349 INFO L247 ElimStorePlain]: Needed 20 recursive calls to eliminate 8 variables, input treesize:521, output treesize:139 [2021-06-12 19:57:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917774729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:13,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 19:57:13,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831694551] [2021-06-12 19:57:13,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:13,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:13,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:13,491 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) [2021-06-12 19:57:14,009 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-06-12 19:57:14,262 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-06-12 19:57:14,450 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-12 19:57:14,677 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-06-12 19:57:14,941 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-06-12 19:57:15,218 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-06-12 19:57:15,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:15,293 INFO L93 Difference]: Finished difference Result 355 states and 1007 transitions. [2021-06-12 19:57:15,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:57:15,294 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 [2021-06-12 19:57:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:15,294 INFO L225 Difference]: With dead ends: 355 [2021-06-12 19:57:15,294 INFO L226 Difference]: Without dead ends: 343 [2021-06-12 19:57:15,294 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1908.5ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-12 19:57:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 232. [2021-06-12 19:57:15,298 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) [2021-06-12 19:57:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 691 transitions. [2021-06-12 19:57:15,298 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 691 transitions. Word has length 17 [2021-06-12 19:57:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:15,298 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 691 transitions. [2021-06-12 19:57:15,299 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) [2021-06-12 19:57:15,299 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 691 transitions. [2021-06-12 19:57:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:15,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:15,299 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:15,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4703 [2021-06-12 19:57:15,522 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:15,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1879133244, now seen corresponding path program 134 times [2021-06-12 19:57:15,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:15,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788080459] [2021-06-12 19:57:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:15,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:15,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788080459] [2021-06-12 19:57:15,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788080459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756471187] [2021-06-12 19:57:15,650 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 [2021-06-12 19:57:15,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:15,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:15,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:15,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:15,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,790 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 [2021-06-12 19:57:15,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,794 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 25 treesize of output 19 [2021-06-12 19:57:15,794 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,797 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 17 treesize of output 13 [2021-06-12 19:57:15,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:15,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:15,801 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 27 treesize of output 21 [2021-06-12 19:57:15,802 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:15,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:15,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:15,845 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-12 19:57:15,928 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1181, v_prenex_1183, v_prenex_1185, array_2], 1=[v_prenex_1180, v_prenex_1182, array_0, v_prenex_1184]} [2021-06-12 19:57:15,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:15,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:15,937 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 17 treesize of output 13 [2021-06-12 19:57:15,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,111 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-06-12 19:57:16,111 INFO L628 ElimStorePlain]: treesize reduction 88, result has 76.6 percent of original size [2021-06-12 19:57:16,114 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 [2021-06-12 19:57:16,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:16,291 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-12 19:57:16,291 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.3 percent of original size [2021-06-12 19:57:16,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:16,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,449 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-12 19:57:16,450 INFO L628 ElimStorePlain]: treesize reduction 26, result has 90.8 percent of original size [2021-06-12 19:57:16,453 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 28 treesize of output 22 [2021-06-12 19:57:16,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,457 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 19 treesize of output 15 [2021-06-12 19:57:16,458 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,461 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 21 treesize of output 17 [2021-06-12 19:57:16,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,465 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 38 treesize of output 30 [2021-06-12 19:57:16,466 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:16,621 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-06-12 19:57:16,621 INFO L628 ElimStorePlain]: treesize reduction 10, result has 96.3 percent of original size [2021-06-12 19:57:16,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,625 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 10 treesize of output 5 [2021-06-12 19:57:16,626 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,629 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 20 treesize of output 9 [2021-06-12 19:57:16,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,712 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 [2021-06-12 19:57:16,712 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,716 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 11 treesize of output 3 [2021-06-12 19:57:16,716 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,796 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 12 treesize of output 5 [2021-06-12 19:57:16,796 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,799 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 44 treesize of output 19 [2021-06-12 19:57:16,800 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,813 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 12 treesize of output 5 [2021-06-12 19:57:16,813 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,817 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 11 treesize of output 3 [2021-06-12 19:57:16,817 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,820 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 21 treesize of output 7 [2021-06-12 19:57:16,820 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,886 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1184 vanished before elimination [2021-06-12 19:57:16,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:57:16,887 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:374, output treesize:161 [2021-06-12 19:57:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:17,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756471187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:17,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:17,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:57:17,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978586294] [2021-06-12 19:57:17,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:17,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:17,055 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) [2021-06-12 19:57:17,490 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 19:57:17,701 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-06-12 19:57:17,971 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-12 19:57:18,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:18,005 INFO L93 Difference]: Finished difference Result 332 states and 960 transitions. [2021-06-12 19:57:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:18,005 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 [2021-06-12 19:57:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:18,006 INFO L225 Difference]: With dead ends: 332 [2021-06-12 19:57:18,006 INFO L226 Difference]: Without dead ends: 324 [2021-06-12 19:57:18,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1069.2ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:18,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-12 19:57:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 232. [2021-06-12 19:57:18,008 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) [2021-06-12 19:57:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 691 transitions. [2021-06-12 19:57:18,009 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 691 transitions. Word has length 17 [2021-06-12 19:57:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:18,009 INFO L482 AbstractCegarLoop]: Abstraction has 232 states and 691 transitions. [2021-06-12 19:57:18,009 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) [2021-06-12 19:57:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 691 transitions. [2021-06-12 19:57:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:18,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:18,009 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:18,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:18,209 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash -798958798, now seen corresponding path program 135 times [2021-06-12 19:57:18,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:18,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004524099] [2021-06-12 19:57:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:18,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:18,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004524099] [2021-06-12 19:57:18,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004524099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824660670] [2021-06-12 19:57:18,375 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 [2021-06-12 19:57:18,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:18,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,484 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 17 treesize of output 13 [2021-06-12 19:57:18,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,487 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 15 treesize of output 11 [2021-06-12 19:57:18,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,491 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 [2021-06-12 19:57:18,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,494 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 27 treesize of output 21 [2021-06-12 19:57:18,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:18,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:18,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:18,534 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-12 19:57:18,612 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1191, v_prenex_1187, array_4, v_prenex_1189], 1=[array_2, v_prenex_1186, v_prenex_1188, v_prenex_1190]} [2021-06-12 19:57:18,616 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 [2021-06-12 19:57:18,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,620 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 15 treesize of output 11 [2021-06-12 19:57:18,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,750 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-12 19:57:18,750 INFO L628 ElimStorePlain]: treesize reduction 105, result has 68.2 percent of original size [2021-06-12 19:57:18,753 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 27 treesize of output 21 [2021-06-12 19:57:18,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:18,875 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-06-12 19:57:18,875 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-12 19:57:18,879 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 38 treesize of output 30 [2021-06-12 19:57:18,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:18,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,887 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 21 treesize of output 17 [2021-06-12 19:57:18,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,891 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 28 treesize of output 22 [2021-06-12 19:57:18,892 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,012 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 19:57:19,013 INFO L628 ElimStorePlain]: treesize reduction 11, result has 95.4 percent of original size [2021-06-12 19:57:19,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:19,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:19,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,087 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 12 treesize of output 5 [2021-06-12 19:57:19,087 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,091 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 11 treesize of output 3 [2021-06-12 19:57:19,091 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,094 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 12 treesize of output 5 [2021-06-12 19:57:19,095 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,098 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 46 treesize of output 15 [2021-06-12 19:57:19,098 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,110 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 [2021-06-12 19:57:19,110 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,174 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 10 treesize of output 5 [2021-06-12 19:57:19,174 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,177 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 20 treesize of output 9 [2021-06-12 19:57:19,177 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:19,245 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 [2021-06-12 19:57:19,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,247 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 [2021-06-12 19:57:19,248 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:19,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:19,311 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1190 vanished before elimination [2021-06-12 19:57:19,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:57:19,313 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 8 variables, input treesize:344, output treesize:136 [2021-06-12 19:57:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:19,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824660670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:19,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:19,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 19:57:19,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687039867] [2021-06-12 19:57:19,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:57:19,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:19,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:57:19,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:57:19,451 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) [2021-06-12 19:57:19,884 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-12 19:57:20,102 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-12 19:57:20,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:20,165 INFO L93 Difference]: Finished difference Result 330 states and 957 transitions. [2021-06-12 19:57:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:57:20,166 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 [2021-06-12 19:57:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:20,166 INFO L225 Difference]: With dead ends: 330 [2021-06-12 19:57:20,166 INFO L226 Difference]: Without dead ends: 326 [2021-06-12 19:57:20,166 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 793.0ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-12 19:57:20,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2021-06-12 19:57:20,169 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) [2021-06-12 19:57:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 682 transitions. [2021-06-12 19:57:20,169 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 682 transitions. Word has length 17 [2021-06-12 19:57:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:20,169 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 682 transitions. [2021-06-12 19:57:20,169 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) [2021-06-12 19:57:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 682 transitions. [2021-06-12 19:57:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:57:20,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:20,169 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:20,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4739 [2021-06-12 19:57:20,370 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 309049932, now seen corresponding path program 136 times [2021-06-12 19:57:20,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:20,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440308603] [2021-06-12 19:57:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440308603] [2021-06-12 19:57:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440308603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591902163] [2021-06-12 19:57:20,499 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 [2021-06-12 19:57:20,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:20,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,599 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 25 treesize of output 19 [2021-06-12 19:57:20,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:57:20,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,606 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 27 treesize of output 21 [2021-06-12 19:57:20,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:20,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:20,610 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 17 treesize of output 13 [2021-06-12 19:57:20,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:20,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:20,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:137, output treesize:127 [2021-06-12 19:57:20,800 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1193, array_2], 1=[v_prenex_1192, array_0]} [2021-06-12 19:57:20,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:20,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:20,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:20,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:20,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:20,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:20,818 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 27 treesize of output 21 [2021-06-12 19:57:20,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:20,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:20,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:57:21,004 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-12 19:57:21,005 INFO L628 ElimStorePlain]: treesize reduction 223, result has 55.8 percent of original size [2021-06-12 19:57:21,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:21,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:21,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:21,017 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,095 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 12 treesize of output 5 [2021-06-12 19:57:21,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,099 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 21 treesize of output 7 [2021-06-12 19:57:21,100 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,104 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 11 treesize of output 3 [2021-06-12 19:57:21,104 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,116 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 12 treesize of output 5 [2021-06-12 19:57:21,116 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,119 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 44 treesize of output 19 [2021-06-12 19:57:21,120 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,133 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 10 treesize of output 5 [2021-06-12 19:57:21,133 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,136 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 20 treesize of output 9 [2021-06-12 19:57:21,137 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,219 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 [2021-06-12 19:57:21,219 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,222 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 21 treesize of output 7 [2021-06-12 19:57:21,222 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:57:21,289 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 4 variables, input treesize:374, output treesize:161 [2021-06-12 19:57:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591902163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:21,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:57:21,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679929666] [2021-06-12 19:57:21,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:57:21,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:57:21,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:57:21,456 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) [2021-06-12 19:57:21,784 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-12 19:57:22,041 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 61 [2021-06-12 19:57:22,398 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-06-12 19:57:22,795 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 82 [2021-06-12 19:57:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:22,836 INFO L93 Difference]: Finished difference Result 365 states and 1050 transitions. [2021-06-12 19:57:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:57:22,836 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 [2021-06-12 19:57:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:22,837 INFO L225 Difference]: With dead ends: 365 [2021-06-12 19:57:22,837 INFO L226 Difference]: Without dead ends: 357 [2021-06-12 19:57:22,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-12 19:57:22,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 227. [2021-06-12 19:57:22,839 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) [2021-06-12 19:57:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 676 transitions. [2021-06-12 19:57:22,840 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 676 transitions. Word has length 17 [2021-06-12 19:57:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:22,840 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 676 transitions. [2021-06-12 19:57:22,840 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) [2021-06-12 19:57:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 676 transitions. [2021-06-12 19:57:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:22,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:22,840 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:23,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4759,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:23,041 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:23,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:23,041 INFO L82 PathProgramCache]: Analyzing trace with hash -697232062, now seen corresponding path program 137 times [2021-06-12 19:57:23,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:23,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962640845] [2021-06-12 19:57:23,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:23,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962640845] [2021-06-12 19:57:23,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962640845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064182610] [2021-06-12 19:57:23,155 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 [2021-06-12 19:57:23,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:23,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,385 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 26 treesize of output 20 [2021-06-12 19:57:23,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,389 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 16 treesize of output 12 [2021-06-12 19:57:23,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,393 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 [2021-06-12 19:57:23,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,397 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 [2021-06-12 19:57:23,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,401 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 25 treesize of output 19 [2021-06-12 19:57:23,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,411 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 15 treesize of output 11 [2021-06-12 19:57:23,412 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,505 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 19:57:23,509 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. [2021-06-12 19:57:23,509 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-12 19:57:23,678 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:57:23,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:23,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:23,683 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 25 treesize of output 19 [2021-06-12 19:57:23,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,704 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:57:23,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,705 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 [2021-06-12 19:57:23,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:23,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:23,712 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:57:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064182610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:23,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774929222] [2021-06-12 19:57:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:23,734 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) [2021-06-12 19:57:24,156 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 19:57:24,495 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-12 19:57:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:24,652 INFO L93 Difference]: Finished difference Result 366 states and 1018 transitions. [2021-06-12 19:57:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:24,652 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 [2021-06-12 19:57:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:24,653 INFO L225 Difference]: With dead ends: 366 [2021-06-12 19:57:24,653 INFO L226 Difference]: Without dead ends: 360 [2021-06-12 19:57:24,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1058.5ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:24,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-12 19:57:24,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 238. [2021-06-12 19:57:24,656 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) [2021-06-12 19:57:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 710 transitions. [2021-06-12 19:57:24,656 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 710 transitions. Word has length 18 [2021-06-12 19:57:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:24,656 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 710 transitions. [2021-06-12 19:57:24,656 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) [2021-06-12 19:57:24,656 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 710 transitions. [2021-06-12 19:57:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:24,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:24,657 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:24,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4780 [2021-06-12 19:57:24,857 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash -741485940, now seen corresponding path program 138 times [2021-06-12 19:57:24,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:24,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87995748] [2021-06-12 19:57:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:24,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87995748] [2021-06-12 19:57:24,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87995748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:24,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482604414] [2021-06-12 19:57:24,969 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 [2021-06-12 19:57:24,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:57:24,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:25,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,220 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 [2021-06-12 19:57:25,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,224 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 17 treesize of output 13 [2021-06-12 19:57:25,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,274 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 [2021-06-12 19:57:25,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,278 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 27 treesize of output 21 [2021-06-12 19:57:25,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:25,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,329 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 25 treesize of output 19 [2021-06-12 19:57:25,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,333 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 15 treesize of output 11 [2021-06-12 19:57:25,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,382 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. [2021-06-12 19:57:25,382 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:172, output treesize:146 [2021-06-12 19:57:25,697 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_0]} [2021-06-12 19:57:25,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,701 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 15 treesize of output 11 [2021-06-12 19:57:25,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,706 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 [2021-06-12 19:57:25,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,710 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 28 treesize of output 22 [2021-06-12 19:57:25,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,715 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 16 treesize of output 12 [2021-06-12 19:57:25,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,720 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 [2021-06-12 19:57:25,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,725 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 25 treesize of output 19 [2021-06-12 19:57:25,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,730 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 26 treesize of output 20 [2021-06-12 19:57:25,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,735 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 18 treesize of output 14 [2021-06-12 19:57:25,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,740 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 27 treesize of output 21 [2021-06-12 19:57:25,740 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,744 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 19 treesize of output 15 [2021-06-12 19:57:25,745 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,749 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 26 treesize of output 20 [2021-06-12 19:57:25,750 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,753 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 15 treesize of output 11 [2021-06-12 19:57:25,754 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,879 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-12 19:57:25,880 INFO L628 ElimStorePlain]: treesize reduction 122, result has 52.0 percent of original size [2021-06-12 19:57:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,884 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 10 treesize of output 5 [2021-06-12 19:57:25,884 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:25,887 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 20 treesize of output 9 [2021-06-12 19:57:25,888 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:25,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:25,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:57:25,940 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:405, output treesize:58 [2021-06-12 19:57:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482604414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:26,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:57:26,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286378244] [2021-06-12 19:57:26,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:26,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:26,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:26,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:26,020 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) [2021-06-12 19:57:26,737 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 106 [2021-06-12 19:57:27,209 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-06-12 19:57:27,599 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 113 [2021-06-12 19:57:27,996 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 125 [2021-06-12 19:57:28,228 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 120 [2021-06-12 19:57:28,427 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-06-12 19:57:28,814 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130 [2021-06-12 19:57:29,059 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 126 [2021-06-12 19:57:29,279 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 113 [2021-06-12 19:57:29,476 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-12 19:57:29,629 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-12 19:57:29,946 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-06-12 19:57:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:30,020 INFO L93 Difference]: Finished difference Result 591 states and 1634 transitions. [2021-06-12 19:57:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:57:30,021 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 [2021-06-12 19:57:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:30,021 INFO L225 Difference]: With dead ends: 591 [2021-06-12 19:57:30,021 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 19:57:30,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3836.7ms TimeCoverageRelationStatistics Valid=450, Invalid=1712, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:57:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 19:57:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 279. [2021-06-12 19:57:30,025 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) [2021-06-12 19:57:30,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 822 transitions. [2021-06-12 19:57:30,025 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 822 transitions. Word has length 18 [2021-06-12 19:57:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:30,026 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 822 transitions. [2021-06-12 19:57:30,026 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) [2021-06-12 19:57:30,026 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 822 transitions. [2021-06-12 19:57:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:30,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:30,026 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:30,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4796,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:30,227 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:30,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:30,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1648668880, now seen corresponding path program 139 times [2021-06-12 19:57:30,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:30,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840378050] [2021-06-12 19:57:30,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840378050] [2021-06-12 19:57:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840378050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129949609] [2021-06-12 19:57:30,325 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 [2021-06-12 19:57:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:30,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,566 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 26 treesize of output 20 [2021-06-12 19:57:30,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,571 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 16 treesize of output 12 [2021-06-12 19:57:30,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,576 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 [2021-06-12 19:57:30,577 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,582 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 16 treesize of output 12 [2021-06-12 19:57:30,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,586 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 [2021-06-12 19:57:30,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,591 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 15 treesize of output 11 [2021-06-12 19:57:30,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,708 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-06-12 19:57:30,708 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 19:57:30,713 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. [2021-06-12 19:57:30,714 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-12 19:57:30,960 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:57:30,962 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 25 treesize of output 19 [2021-06-12 19:57:30,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:30,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:30,989 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:57:30,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,991 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 21 treesize of output 7 [2021-06-12 19:57:30,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:30,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:30,998 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:57:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:31,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129949609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:31,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:31,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894905888] [2021-06-12 19:57:31,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:31,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:31,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:31,019 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) [2021-06-12 19:57:31,455 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 19:57:31,630 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 19:57:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:31,895 INFO L93 Difference]: Finished difference Result 398 states and 1123 transitions. [2021-06-12 19:57:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:31,895 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 [2021-06-12 19:57:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:31,896 INFO L225 Difference]: With dead ends: 398 [2021-06-12 19:57:31,896 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 19:57:31,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1025.0ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 19:57:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 281. [2021-06-12 19:57:31,899 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) [2021-06-12 19:57:31,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 827 transitions. [2021-06-12 19:57:31,900 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 827 transitions. Word has length 18 [2021-06-12 19:57:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:31,900 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 827 transitions. [2021-06-12 19:57:31,900 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) [2021-06-12 19:57:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 827 transitions. [2021-06-12 19:57:31,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:31,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:31,900 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:32,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4833,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:32,101 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:32,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:32,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1165060546, now seen corresponding path program 140 times [2021-06-12 19:57:32,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:32,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144277176] [2021-06-12 19:57:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:32,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144277176] [2021-06-12 19:57:32,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144277176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506840982] [2021-06-12 19:57:32,218 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 [2021-06-12 19:57:32,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:32,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,448 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 [2021-06-12 19:57:32,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,452 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 16 treesize of output 12 [2021-06-12 19:57:32,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,456 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 26 treesize of output 20 [2021-06-12 19:57:32,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,460 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 16 treesize of output 12 [2021-06-12 19:57:32,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,464 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 [2021-06-12 19:57:32,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,467 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 [2021-06-12 19:57:32,468 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,561 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 19:57:32,565 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. [2021-06-12 19:57:32,565 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-12 19:57:32,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,732 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 17 treesize of output 13 [2021-06-12 19:57:32,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,736 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 15 treesize of output 11 [2021-06-12 19:57:32,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,799 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-12 19:57:32,799 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:57:32,802 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 7 treesize of output 5 [2021-06-12 19:57:32,803 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,826 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 [2021-06-12 19:57:32,827 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:32,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,850 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1223 vanished before elimination [2021-06-12 19:57:32,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:32,853 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 7 [2021-06-12 19:57:32,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,855 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 11 treesize of output 3 [2021-06-12 19:57:32,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:32,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:32,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:32,886 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:57:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506840982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:32,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:32,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544291143] [2021-06-12 19:57:32,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:32,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:32,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:32,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:32,945 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) [2021-06-12 19:57:33,436 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 19:57:33,803 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-12 19:57:34,016 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-06-12 19:57:34,188 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2021-06-12 19:57:34,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:34,471 INFO L93 Difference]: Finished difference Result 485 states and 1284 transitions. [2021-06-12 19:57:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:34,471 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 [2021-06-12 19:57:34,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:34,472 INFO L225 Difference]: With dead ends: 485 [2021-06-12 19:57:34,472 INFO L226 Difference]: Without dead ends: 477 [2021-06-12 19:57:34,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1602.6ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-12 19:57:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 281. [2021-06-12 19:57:34,475 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) [2021-06-12 19:57:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 827 transitions. [2021-06-12 19:57:34,476 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 827 transitions. Word has length 18 [2021-06-12 19:57:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:34,476 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 827 transitions. [2021-06-12 19:57:34,476 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) [2021-06-12 19:57:34,476 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 827 transitions. [2021-06-12 19:57:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:34,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:34,476 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:34,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4849 [2021-06-12 19:57:34,677 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:34,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:34,677 INFO L82 PathProgramCache]: Analyzing trace with hash 575583500, now seen corresponding path program 141 times [2021-06-12 19:57:34,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:34,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142765719] [2021-06-12 19:57:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:34,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:34,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:34,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142765719] [2021-06-12 19:57:34,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142765719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:34,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197578706] [2021-06-12 19:57:34,771 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 [2021-06-12 19:57:34,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:34,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:34,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:35,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,048 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 15 treesize of output 11 [2021-06-12 19:57:35,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:57:35,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,056 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 [2021-06-12 19:57:35,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,060 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 15 treesize of output 11 [2021-06-12 19:57:35,061 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,064 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 16 treesize of output 12 [2021-06-12 19:57:35,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,068 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 16 treesize of output 12 [2021-06-12 19:57:35,068 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,179 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:57:35,179 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:57:35,183 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. [2021-06-12 19:57:35,183 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:57:35,338 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:57:35,339 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 27 treesize of output 21 [2021-06-12 19:57:35,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:35,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:35,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,362 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:57:35,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,364 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 21 treesize of output 7 [2021-06-12 19:57:35,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:35,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:35,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:57:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197578706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:35,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:35,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942550483] [2021-06-12 19:57:35,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:35,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:35,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:35,393 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) [2021-06-12 19:57:35,944 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-06-12 19:57:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:36,192 INFO L93 Difference]: Finished difference Result 373 states and 1063 transitions. [2021-06-12 19:57:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:36,193 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 [2021-06-12 19:57:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:36,193 INFO L225 Difference]: With dead ends: 373 [2021-06-12 19:57:36,193 INFO L226 Difference]: Without dead ends: 367 [2021-06-12 19:57:36,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 966.7ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-12 19:57:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 285. [2021-06-12 19:57:36,196 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) [2021-06-12 19:57:36,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 839 transitions. [2021-06-12 19:57:36,197 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 839 transitions. Word has length 18 [2021-06-12 19:57:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:36,197 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 839 transitions. [2021-06-12 19:57:36,197 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) [2021-06-12 19:57:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 839 transitions. [2021-06-12 19:57:36,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:36,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:36,197 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:36,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4867,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:36,398 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:36,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:36,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1033000770, now seen corresponding path program 142 times [2021-06-12 19:57:36,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:36,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709964314] [2021-06-12 19:57:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:36,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:36,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709964314] [2021-06-12 19:57:36,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709964314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451120272] [2021-06-12 19:57:36,498 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 [2021-06-12 19:57:36,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:36,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,798 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 25 treesize of output 19 [2021-06-12 19:57:36,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,802 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 [2021-06-12 19:57:36,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:36,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,859 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 [2021-06-12 19:57:36,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:57:36,864 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,918 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 27 treesize of output 21 [2021-06-12 19:57:36,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:36,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:36,922 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 25 treesize of output 19 [2021-06-12 19:57:36,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:36,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:36,980 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. [2021-06-12 19:57:36,980 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:190, output treesize:164 [2021-06-12 19:57:37,241 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-12 19:57:37,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,248 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 25 treesize of output 19 [2021-06-12 19:57:37,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,254 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 16 treesize of output 12 [2021-06-12 19:57:37,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,261 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 18 treesize of output 14 [2021-06-12 19:57:37,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,268 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 [2021-06-12 19:57:37,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,274 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 15 treesize of output 11 [2021-06-12 19:57:37,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:57:37,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:57:37,289 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,294 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 19 treesize of output 15 [2021-06-12 19:57:37,295 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,300 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 [2021-06-12 19:57:37,301 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,306 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 28 treesize of output 22 [2021-06-12 19:57:37,307 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,312 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 15 treesize of output 11 [2021-06-12 19:57:37,313 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,317 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 25 treesize of output 19 [2021-06-12 19:57:37,319 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,429 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-12 19:57:37,430 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-06-12 19:57:37,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,434 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 10 treesize of output 5 [2021-06-12 19:57:37,434 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,437 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 [2021-06-12 19:57:37,438 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:37,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:57:37,480 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-06-12 19:57:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:37,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451120272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:37,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:57:37,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966224669] [2021-06-12 19:57:37,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:37,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:37,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:37,556 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) [2021-06-12 19:57:38,436 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2021-06-12 19:57:38,908 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2021-06-12 19:57:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:39,803 INFO L93 Difference]: Finished difference Result 506 states and 1412 transitions. [2021-06-12 19:57:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:57:39,803 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 [2021-06-12 19:57:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:39,804 INFO L225 Difference]: With dead ends: 506 [2021-06-12 19:57:39,804 INFO L226 Difference]: Without dead ends: 470 [2021-06-12 19:57:39,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2128.9ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:57:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-12 19:57:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 297. [2021-06-12 19:57:39,808 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) [2021-06-12 19:57:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 877 transitions. [2021-06-12 19:57:39,809 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 877 transitions. Word has length 18 [2021-06-12 19:57:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:39,809 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 877 transitions. [2021-06-12 19:57:39,809 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) [2021-06-12 19:57:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 877 transitions. [2021-06-12 19:57:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:39,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:39,810 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:40,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4887 [2021-06-12 19:57:40,032 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:40,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:40,032 INFO L82 PathProgramCache]: Analyzing trace with hash 2056821370, now seen corresponding path program 143 times [2021-06-12 19:57:40,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:40,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666225157] [2021-06-12 19:57:40,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:40,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666225157] [2021-06-12 19:57:40,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666225157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388420176] [2021-06-12 19:57:40,147 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 [2021-06-12 19:57:40,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:40,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:40,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,422 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 15 treesize of output 11 [2021-06-12 19:57:40,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,426 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 [2021-06-12 19:57:40,427 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,430 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 [2021-06-12 19:57:40,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,435 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 15 treesize of output 11 [2021-06-12 19:57:40,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,439 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 16 treesize of output 12 [2021-06-12 19:57:40,439 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,442 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 16 treesize of output 12 [2021-06-12 19:57:40,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,550 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:57:40,550 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:57:40,559 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. [2021-06-12 19:57:40,559 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:57:40,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,692 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 27 treesize of output 21 [2021-06-12 19:57:40,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:40,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,697 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 25 treesize of output 19 [2021-06-12 19:57:40,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,766 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-06-12 19:57:40,768 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 7 treesize of output 5 [2021-06-12 19:57:40,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:40,797 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 11 treesize of output 3 [2021-06-12 19:57:40,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,800 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 21 treesize of output 7 [2021-06-12 19:57:40,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,834 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 [2021-06-12 19:57:40,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:40,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:40,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1247 vanished before elimination [2021-06-12 19:57:40,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1249 vanished before elimination [2021-06-12 19:57:40,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:40,859 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:57:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388420176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:40,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472498743] [2021-06-12 19:57:40,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:40,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:40,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:40,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:40,918 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) [2021-06-12 19:57:41,773 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-06-12 19:57:41,947 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-12 19:57:42,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:42,226 INFO L93 Difference]: Finished difference Result 459 states and 1244 transitions. [2021-06-12 19:57:42,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:57:42,226 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 [2021-06-12 19:57:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:42,227 INFO L225 Difference]: With dead ends: 459 [2021-06-12 19:57:42,227 INFO L226 Difference]: Without dead ends: 451 [2021-06-12 19:57:42,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1360.4ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-12 19:57:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 295. [2021-06-12 19:57:42,230 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) [2021-06-12 19:57:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-06-12 19:57:42,231 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-06-12 19:57:42,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:42,231 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-06-12 19:57:42,231 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) [2021-06-12 19:57:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-06-12 19:57:42,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:42,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:42,231 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:42,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4929 [2021-06-12 19:57:42,432 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:42,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:42,432 INFO L82 PathProgramCache]: Analyzing trace with hash 740664066, now seen corresponding path program 144 times [2021-06-12 19:57:42,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408168843] [2021-06-12 19:57:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:42,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:42,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408168843] [2021-06-12 19:57:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408168843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845370985] [2021-06-12 19:57:42,540 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 [2021-06-12 19:57:42,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:42,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,817 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 25 treesize of output 19 [2021-06-12 19:57:42,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,821 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 27 treesize of output 21 [2021-06-12 19:57:42,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:42,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,885 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 15 treesize of output 11 [2021-06-12 19:57:42,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,889 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 [2021-06-12 19:57:42,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:42,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,954 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 17 treesize of output 13 [2021-06-12 19:57:42,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:42,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:42,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:57:42,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,015 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. [2021-06-12 19:57:43,015 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-12 19:57:43,175 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 19:57:43,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,179 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 [2021-06-12 19:57:43,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,184 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 16 treesize of output 12 [2021-06-12 19:57:43,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,188 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 29 treesize of output 23 [2021-06-12 19:57:43,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,193 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 17 treesize of output 13 [2021-06-12 19:57:43,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:57:43,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,201 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 [2021-06-12 19:57:43,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,206 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 25 treesize of output 19 [2021-06-12 19:57:43,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,210 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 16 treesize of output 12 [2021-06-12 19:57:43,211 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,215 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 28 treesize of output 22 [2021-06-12 19:57:43,215 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,220 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 19 treesize of output 15 [2021-06-12 19:57:43,220 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,224 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 18 treesize of output 14 [2021-06-12 19:57:43,225 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,228 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 15 treesize of output 11 [2021-06-12 19:57:43,229 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,375 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-12 19:57:43,375 INFO L628 ElimStorePlain]: treesize reduction 119, result has 59.7 percent of original size [2021-06-12 19:57:43,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,379 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 [2021-06-12 19:57:43,380 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,383 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 21 treesize of output 7 [2021-06-12 19:57:43,384 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,387 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 9 treesize of output 3 [2021-06-12 19:57:43,387 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:43,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:57:43,444 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:99 [2021-06-12 19:57:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845370985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:43,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:43,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443536008] [2021-06-12 19:57:43,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:43,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:43,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:43,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:43,545 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) [2021-06-12 19:57:44,214 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 102 [2021-06-12 19:57:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:44,496 INFO L93 Difference]: Finished difference Result 386 states and 1106 transitions. [2021-06-12 19:57:44,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:44,497 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 [2021-06-12 19:57:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:44,497 INFO L225 Difference]: With dead ends: 386 [2021-06-12 19:57:44,497 INFO L226 Difference]: Without dead ends: 376 [2021-06-12 19:57:44,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1095.0ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:44,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-12 19:57:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 295. [2021-06-12 19:57:44,500 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) [2021-06-12 19:57:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 872 transitions. [2021-06-12 19:57:44,501 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 872 transitions. Word has length 18 [2021-06-12 19:57:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:44,501 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 872 transitions. [2021-06-12 19:57:44,501 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) [2021-06-12 19:57:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 872 transitions. [2021-06-12 19:57:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:44,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:44,501 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:44,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4947,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:44,702 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:44,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1935700240, now seen corresponding path program 145 times [2021-06-12 19:57:44,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:44,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623592743] [2021-06-12 19:57:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:44,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623592743] [2021-06-12 19:57:44,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623592743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131562218] [2021-06-12 19:57:44,872 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 [2021-06-12 19:57:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:44,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,158 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 15 treesize of output 11 [2021-06-12 19:57:45,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,163 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 16 treesize of output 12 [2021-06-12 19:57:45,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,167 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 [2021-06-12 19:57:45,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,171 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 16 treesize of output 12 [2021-06-12 19:57:45,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,177 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 15 treesize of output 11 [2021-06-12 19:57:45,178 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,182 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 [2021-06-12 19:57:45,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,315 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-12 19:57:45,315 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:57:45,319 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. [2021-06-12 19:57:45,319 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:57:45,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,450 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 17 treesize of output 13 [2021-06-12 19:57:45,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,455 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 [2021-06-12 19:57:45,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,516 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-12 19:57:45,516 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:57:45,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,519 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 27 treesize of output 21 [2021-06-12 19:57:45,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:45,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:45,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,576 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 10 treesize of output 5 [2021-06-12 19:57:45,576 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,578 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 20 treesize of output 9 [2021-06-12 19:57:45,579 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:45,608 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1269 vanished before elimination [2021-06-12 19:57:45,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:45,610 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 19:57:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:45,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131562218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:45,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:57:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715970432] [2021-06-12 19:57:45,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:45,671 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) [2021-06-12 19:57:46,519 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2021-06-12 19:57:46,931 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-12 19:57:47,352 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-12 19:57:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:47,825 INFO L93 Difference]: Finished difference Result 520 states and 1474 transitions. [2021-06-12 19:57:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:57:47,826 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 [2021-06-12 19:57:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:47,826 INFO L225 Difference]: With dead ends: 520 [2021-06-12 19:57:47,826 INFO L226 Difference]: Without dead ends: 493 [2021-06-12 19:57:47,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2041.3ms TimeCoverageRelationStatistics Valid=277, Invalid=1363, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:57:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-12 19:57:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 311. [2021-06-12 19:57:47,830 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) [2021-06-12 19:57:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 936 transitions. [2021-06-12 19:57:47,830 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 936 transitions. Word has length 18 [2021-06-12 19:57:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:47,830 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 936 transitions. [2021-06-12 19:57:47,830 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) [2021-06-12 19:57:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 936 transitions. [2021-06-12 19:57:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:47,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:47,831 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:48,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4976,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:48,031 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -878029186, now seen corresponding path program 146 times [2021-06-12 19:57:48,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:48,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254848464] [2021-06-12 19:57:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:48,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254848464] [2021-06-12 19:57:48,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254848464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216010421] [2021-06-12 19:57:48,148 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 [2021-06-12 19:57:48,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:48,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:48,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,432 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 26 treesize of output 20 [2021-06-12 19:57:48,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,446 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 15 treesize of output 11 [2021-06-12 19:57:48,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,450 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 15 treesize of output 11 [2021-06-12 19:57:48,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,455 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 16 treesize of output 12 [2021-06-12 19:57:48,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,459 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 [2021-06-12 19:57:48,459 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,462 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 16 treesize of output 12 [2021-06-12 19:57:48,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,572 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-12 19:57:48,572 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:57:48,577 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. [2021-06-12 19:57:48,577 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:57:48,730 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1277], 1=[array_2, v_prenex_1276]} [2021-06-12 19:57:48,732 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 25 treesize of output 19 [2021-06-12 19:57:48,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,735 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 15 treesize of output 11 [2021-06-12 19:57:48,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,765 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:57:48,766 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 [2021-06-12 19:57:48,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:48,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,781 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:48,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,784 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 20 treesize of output 9 [2021-06-12 19:57:48,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,786 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 10 treesize of output 5 [2021-06-12 19:57:48,787 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:48,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:57:48,807 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-12 19:57:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216010421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:48,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:57:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518781002] [2021-06-12 19:57:48,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:48,832 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) [2021-06-12 19:57:49,946 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 72 [2021-06-12 19:57:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:51,070 INFO L93 Difference]: Finished difference Result 536 states and 1555 transitions. [2021-06-12 19:57:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:57:51,071 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 [2021-06-12 19:57:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:51,071 INFO L225 Difference]: With dead ends: 536 [2021-06-12 19:57:51,071 INFO L226 Difference]: Without dead ends: 515 [2021-06-12 19:57:51,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2087.2ms TimeCoverageRelationStatistics Valid=297, Invalid=1425, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:57:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-12 19:57:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 322. [2021-06-12 19:57:51,075 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) [2021-06-12 19:57:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 978 transitions. [2021-06-12 19:57:51,076 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 978 transitions. Word has length 18 [2021-06-12 19:57:51,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:51,076 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 978 transitions. [2021-06-12 19:57:51,076 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) [2021-06-12 19:57:51,076 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 978 transitions. [2021-06-12 19:57:51,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:51,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:51,076 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:51,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5002 [2021-06-12 19:57:51,277 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 69237234, now seen corresponding path program 147 times [2021-06-12 19:57:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:51,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609070199] [2021-06-12 19:57:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609070199] [2021-06-12 19:57:51,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609070199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210984188] [2021-06-12 19:57:51,368 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 [2021-06-12 19:57:51,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:57:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:51,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,644 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 15 treesize of output 11 [2021-06-12 19:57:51,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,648 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 26 treesize of output 20 [2021-06-12 19:57:51,649 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,652 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 16 treesize of output 12 [2021-06-12 19:57:51,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,656 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 [2021-06-12 19:57:51,657 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,660 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 15 treesize of output 11 [2021-06-12 19:57:51,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,664 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 16 treesize of output 12 [2021-06-12 19:57:51,665 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,776 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:57:51,777 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:57:51,781 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. [2021-06-12 19:57:51,781 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:57:51,938 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:57:51,940 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 25 treesize of output 19 [2021-06-12 19:57:51,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,948 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 [2021-06-12 19:57:51,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:51,968 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:57:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:51,970 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 21 treesize of output 7 [2021-06-12 19:57:51,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:51,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:51,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:51,977 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:57:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210984188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:51,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:51,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755299682] [2021-06-12 19:57:51,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:51,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:51,998 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) [2021-06-12 19:57:52,597 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-06-12 19:57:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:52,865 INFO L93 Difference]: Finished difference Result 430 states and 1261 transitions. [2021-06-12 19:57:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:57:52,865 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 [2021-06-12 19:57:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:52,866 INFO L225 Difference]: With dead ends: 430 [2021-06-12 19:57:52,866 INFO L226 Difference]: Without dead ends: 424 [2021-06-12 19:57:52,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 981.6ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:57:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-12 19:57:52,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 328. [2021-06-12 19:57:52,869 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) [2021-06-12 19:57:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 995 transitions. [2021-06-12 19:57:52,869 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 995 transitions. Word has length 18 [2021-06-12 19:57:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:52,870 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 995 transitions. [2021-06-12 19:57:52,870 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) [2021-06-12 19:57:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 995 transitions. [2021-06-12 19:57:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:52,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:52,870 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:53,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5025 [2021-06-12 19:57:53,070 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:53,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1539347036, now seen corresponding path program 148 times [2021-06-12 19:57:53,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:53,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414334273] [2021-06-12 19:57:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:53,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:53,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414334273] [2021-06-12 19:57:53,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414334273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:53,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318188733] [2021-06-12 19:57:53,164 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 [2021-06-12 19:57:53,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:53,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:53,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:53,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,460 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 15 treesize of output 11 [2021-06-12 19:57:53,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,464 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 17 treesize of output 13 [2021-06-12 19:57:53,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,522 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 25 treesize of output 19 [2021-06-12 19:57:53,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,526 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 [2021-06-12 19:57:53,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,581 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 25 treesize of output 19 [2021-06-12 19:57:53,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,584 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 [2021-06-12 19:57:53,585 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:53,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:53,641 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. [2021-06-12 19:57:53,641 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:190, output treesize:164 [2021-06-12 19:57:53,898 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_0]} [2021-06-12 19:57:53,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,903 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 18 treesize of output 14 [2021-06-12 19:57:53,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,907 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 16 treesize of output 12 [2021-06-12 19:57:53,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,912 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 19 treesize of output 15 [2021-06-12 19:57:53,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,916 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 [2021-06-12 19:57:53,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,921 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 26 treesize of output 20 [2021-06-12 19:57:53,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,926 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 15 treesize of output 11 [2021-06-12 19:57:53,926 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,930 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 25 treesize of output 19 [2021-06-12 19:57:53,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,935 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 [2021-06-12 19:57:53,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,939 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 [2021-06-12 19:57:53,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,944 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 [2021-06-12 19:57:53,944 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:53,948 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 16 treesize of output 12 [2021-06-12 19:57:53,949 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:53,952 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 [2021-06-12 19:57:53,953 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,062 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-12 19:57:54,063 INFO L628 ElimStorePlain]: treesize reduction 136, result has 46.5 percent of original size [2021-06-12 19:57:54,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:54,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:54,067 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 10 treesize of output 5 [2021-06-12 19:57:54,067 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:54,070 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 20 treesize of output 9 [2021-06-12 19:57:54,071 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:54,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:54,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 19:57:54,113 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-06-12 19:57:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318188733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:54,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:57:54,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429444257] [2021-06-12 19:57:54,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:57:54,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:54,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:57:54,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:57:54,188 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) [2021-06-12 19:57:55,120 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 117 [2021-06-12 19:57:55,721 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 124 [2021-06-12 19:57:56,012 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-06-12 19:57:56,201 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 19:57:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:56,620 INFO L93 Difference]: Finished difference Result 585 states and 1675 transitions. [2021-06-12 19:57:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:57:56,620 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 [2021-06-12 19:57:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:56,621 INFO L225 Difference]: With dead ends: 585 [2021-06-12 19:57:56,621 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 19:57:56,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2357.1ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:57:56,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 19:57:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 340. [2021-06-12 19:57:56,625 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) [2021-06-12 19:57:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 1029 transitions. [2021-06-12 19:57:56,625 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 1029 transitions. Word has length 18 [2021-06-12 19:57:56,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:56,625 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 1029 transitions. [2021-06-12 19:57:56,625 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) [2021-06-12 19:57:56,625 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 1029 transitions. [2021-06-12 19:57:56,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:56,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:56,626 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:56,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5041,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:56,826 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1550475104, now seen corresponding path program 149 times [2021-06-12 19:57:56,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:56,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526001324] [2021-06-12 19:57:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:56,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:56,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526001324] [2021-06-12 19:57:56,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526001324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:56,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816749015] [2021-06-12 19:57:56,952 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 [2021-06-12 19:57:56,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:56,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:57:56,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,238 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 [2021-06-12 19:57:57,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,242 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 26 treesize of output 20 [2021-06-12 19:57:57,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,247 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 [2021-06-12 19:57:57,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,251 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 [2021-06-12 19:57:57,251 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,255 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 [2021-06-12 19:57:57,255 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,258 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 16 treesize of output 12 [2021-06-12 19:57:57,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,366 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:57:57,366 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:57:57,370 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. [2021-06-12 19:57:57,370 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:57:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,490 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 17 treesize of output 13 [2021-06-12 19:57:57,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,494 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 15 treesize of output 11 [2021-06-12 19:57:57,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,555 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-12 19:57:57,555 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:57:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:57:57,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,582 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 27 treesize of output 21 [2021-06-12 19:57:57,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:57,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,607 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1300 vanished before elimination [2021-06-12 19:57:57,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:57,610 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 [2021-06-12 19:57:57,610 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,612 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 11 treesize of output 3 [2021-06-12 19:57:57,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:57,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:57,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:57:57,643 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:57:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816749015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:57,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:57:57,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274824829] [2021-06-12 19:57:57,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:57:57,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:57,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:57:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:57:57,701 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) [2021-06-12 19:57:58,594 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 83 [2021-06-12 19:57:58,776 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-06-12 19:57:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:59,179 INFO L93 Difference]: Finished difference Result 529 states and 1464 transitions. [2021-06-12 19:57:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:59,179 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 [2021-06-12 19:57:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:59,180 INFO L225 Difference]: With dead ends: 529 [2021-06-12 19:57:59,180 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 19:57:59,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1476.1ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:59,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 19:57:59,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 338. [2021-06-12 19:57:59,184 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) [2021-06-12 19:57:59,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1024 transitions. [2021-06-12 19:57:59,184 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1024 transitions. Word has length 18 [2021-06-12 19:57:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:59,184 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1024 transitions. [2021-06-12 19:57:59,184 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) [2021-06-12 19:57:59,184 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1024 transitions. [2021-06-12 19:57:59,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:59,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:59,185 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:59,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5083 [2021-06-12 19:57:59,385 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash 234317800, now seen corresponding path program 150 times [2021-06-12 19:57:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:59,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406281492] [2021-06-12 19:57:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:59,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406281492] [2021-06-12 19:57:59,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406281492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:59,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214776574] [2021-06-12 19:57:59,492 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 [2021-06-12 19:57:59,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:57:59,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:59,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:57:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:59,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,784 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 15 treesize of output 11 [2021-06-12 19:57:59,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,788 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 17 treesize of output 13 [2021-06-12 19:57:59,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,849 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 25 treesize of output 19 [2021-06-12 19:57:59,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,853 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 [2021-06-12 19:57:59,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:57:59,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,912 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 15 treesize of output 11 [2021-06-12 19:57:59,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:59,916 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 17 treesize of output 13 [2021-06-12 19:57:59,917 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:59,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:59,974 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. [2021-06-12 19:57:59,975 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-12 19:58:00,139 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 19:58:00,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,143 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 20 treesize of output 16 [2021-06-12 19:58:00,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,148 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 28 treesize of output 22 [2021-06-12 19:58:00,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,153 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 15 treesize of output 11 [2021-06-12 19:58:00,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,158 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 16 treesize of output 12 [2021-06-12 19:58:00,159 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,172 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 26 treesize of output 20 [2021-06-12 19:58:00,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,185 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 [2021-06-12 19:58:00,186 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,192 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 15 treesize of output 11 [2021-06-12 19:58:00,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,199 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 18 treesize of output 14 [2021-06-12 19:58:00,200 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,206 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 19 treesize of output 15 [2021-06-12 19:58:00,207 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,213 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 16 treesize of output 12 [2021-06-12 19:58:00,214 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,219 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 17 treesize of output 13 [2021-06-12 19:58:00,220 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,225 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 29 treesize of output 23 [2021-06-12 19:58:00,226 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,376 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-12 19:58:00,376 INFO L628 ElimStorePlain]: treesize reduction 138, result has 56.1 percent of original size [2021-06-12 19:58:00,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,380 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 9 treesize of output 3 [2021-06-12 19:58:00,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,384 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 [2021-06-12 19:58:00,385 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:00,388 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 21 treesize of output 7 [2021-06-12 19:58:00,389 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:00,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:00,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:58:00,447 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:99 [2021-06-12 19:58:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:00,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214776574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:00,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:00,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:00,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114163967] [2021-06-12 19:58:00,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:00,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:00,542 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) [2021-06-12 19:58:01,250 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 99 [2021-06-12 19:58:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:01,541 INFO L93 Difference]: Finished difference Result 443 states and 1300 transitions. [2021-06-12 19:58:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:01,541 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 [2021-06-12 19:58:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:01,542 INFO L225 Difference]: With dead ends: 443 [2021-06-12 19:58:01,542 INFO L226 Difference]: Without dead ends: 433 [2021-06-12 19:58:01,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1121.6ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-12 19:58:01,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 338. [2021-06-12 19:58:01,545 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) [2021-06-12 19:58:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1024 transitions. [2021-06-12 19:58:01,546 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1024 transitions. Word has length 18 [2021-06-12 19:58:01,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:01,546 INFO L482 AbstractCegarLoop]: Abstraction has 338 states and 1024 transitions. [2021-06-12 19:58:01,546 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) [2021-06-12 19:58:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1024 transitions. [2021-06-12 19:58:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:01,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:01,546 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:01,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5105,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,747 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:01,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1429353974, now seen corresponding path program 151 times [2021-06-12 19:58:01,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:01,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603957030] [2021-06-12 19:58:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:01,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603957030] [2021-06-12 19:58:01,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603957030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614780651] [2021-06-12 19:58:01,881 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 [2021-06-12 19:58:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:01,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:02,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,171 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 [2021-06-12 19:58:02,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,177 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 16 treesize of output 12 [2021-06-12 19:58:02,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,184 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 16 treesize of output 12 [2021-06-12 19:58:02,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,190 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 15 treesize of output 11 [2021-06-12 19:58:02,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,196 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 25 treesize of output 19 [2021-06-12 19:58:02,197 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,202 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 15 treesize of output 11 [2021-06-12 19:58:02,203 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,321 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-12 19:58:02,321 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:58:02,325 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. [2021-06-12 19:58:02,325 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:58:02,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,456 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 25 treesize of output 19 [2021-06-12 19:58:02,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,461 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 15 treesize of output 11 [2021-06-12 19:58:02,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,523 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-12 19:58:02,523 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1319 vanished before elimination [2021-06-12 19:58:02,526 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 7 treesize of output 5 [2021-06-12 19:58:02,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,552 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:02,554 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 27 treesize of output 21 [2021-06-12 19:58:02,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:02,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,583 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 10 treesize of output 5 [2021-06-12 19:58:02,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:02,586 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 20 treesize of output 9 [2021-06-12 19:58:02,587 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:02,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:02,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:02,618 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 19:58:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:02,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614780651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:02,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:02,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:02,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756227703] [2021-06-12 19:58:02,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:02,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:02,679 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) [2021-06-12 19:58:03,225 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2021-06-12 19:58:03,573 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-06-12 19:58:03,928 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-12 19:58:04,320 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-12 19:58:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:04,761 INFO L93 Difference]: Finished difference Result 581 states and 1679 transitions. [2021-06-12 19:58:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:58:04,761 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 [2021-06-12 19:58:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:04,762 INFO L225 Difference]: With dead ends: 581 [2021-06-12 19:58:04,762 INFO L226 Difference]: Without dead ends: 554 [2021-06-12 19:58:04,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1994.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:58:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-12 19:58:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 342. [2021-06-12 19:58:04,766 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) [2021-06-12 19:58:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1039 transitions. [2021-06-12 19:58:04,767 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1039 transitions. Word has length 18 [2021-06-12 19:58:04,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:04,767 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1039 transitions. [2021-06-12 19:58:04,767 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) [2021-06-12 19:58:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1039 transitions. [2021-06-12 19:58:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:04,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:04,768 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:04,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5134 [2021-06-12 19:58:04,970 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1384375452, now seen corresponding path program 152 times [2021-06-12 19:58:04,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:04,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524946062] [2021-06-12 19:58:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:05,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524946062] [2021-06-12 19:58:05,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524946062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815359839] [2021-06-12 19:58:05,087 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 [2021-06-12 19:58:05,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:05,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:05,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:58:05,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,380 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 [2021-06-12 19:58:05,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,384 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 16 treesize of output 12 [2021-06-12 19:58:05,384 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,388 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 26 treesize of output 20 [2021-06-12 19:58:05,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,392 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 16 treesize of output 12 [2021-06-12 19:58:05,393 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,396 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 25 treesize of output 19 [2021-06-12 19:58:05,397 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,505 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-06-12 19:58:05,505 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:58:05,510 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. [2021-06-12 19:58:05,510 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:58:05,676 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1329, array_4], 1=[v_prenex_1328, array_2]} [2021-06-12 19:58:05,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:05,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,683 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 25 treesize of output 19 [2021-06-12 19:58:05,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,726 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:58:05,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:05,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:05,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,748 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1328 vanished before elimination [2021-06-12 19:58:05,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,751 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 20 treesize of output 9 [2021-06-12 19:58:05,752 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:05,755 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 10 treesize of output 5 [2021-06-12 19:58:05,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:05,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:05,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:05,779 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-12 19:58:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:05,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815359839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:05,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:05,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:05,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405865597] [2021-06-12 19:58:05,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:05,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:05,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:05,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:05,804 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) [2021-06-12 19:58:06,890 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2021-06-12 19:58:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:07,888 INFO L93 Difference]: Finished difference Result 596 states and 1739 transitions. [2021-06-12 19:58:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:58:07,888 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 [2021-06-12 19:58:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:07,889 INFO L225 Difference]: With dead ends: 596 [2021-06-12 19:58:07,889 INFO L226 Difference]: Without dead ends: 575 [2021-06-12 19:58:07,889 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1909.7ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:58:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-12 19:58:07,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 333. [2021-06-12 19:58:07,893 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) [2021-06-12 19:58:07,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1010 transitions. [2021-06-12 19:58:07,893 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1010 transitions. Word has length 18 [2021-06-12 19:58:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:07,894 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1010 transitions. [2021-06-12 19:58:07,894 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) [2021-06-12 19:58:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1010 transitions. [2021-06-12 19:58:07,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:07,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:07,894 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:08,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5160 [2021-06-12 19:58:08,094 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -300912002, now seen corresponding path program 153 times [2021-06-12 19:58:08,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:08,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990333367] [2021-06-12 19:58:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:08,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990333367] [2021-06-12 19:58:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990333367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561975831] [2021-06-12 19:58:08,198 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 [2021-06-12 19:58:08,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:08,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:08,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,502 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 25 treesize of output 19 [2021-06-12 19:58:08,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,506 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 [2021-06-12 19:58:08,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:08,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,579 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 17 treesize of output 13 [2021-06-12 19:58:08,580 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,583 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 15 treesize of output 11 [2021-06-12 19:58:08,584 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,647 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 [2021-06-12 19:58:08,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,651 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 17 treesize of output 13 [2021-06-12 19:58:08,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:08,714 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. [2021-06-12 19:58:08,715 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:199, output treesize:175 [2021-06-12 19:58:08,930 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-12 19:58:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,935 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 19 treesize of output 15 [2021-06-12 19:58:08,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,940 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 26 treesize of output 20 [2021-06-12 19:58:08,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,946 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 [2021-06-12 19:58:08,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,951 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 18 treesize of output 14 [2021-06-12 19:58:08,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,956 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 [2021-06-12 19:58:08,956 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,961 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 [2021-06-12 19:58:08,961 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,966 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 17 treesize of output 13 [2021-06-12 19:58:08,966 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,976 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 28 treesize of output 22 [2021-06-12 19:58:08,977 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,981 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 [2021-06-12 19:58:08,982 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,986 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 16 treesize of output 12 [2021-06-12 19:58:08,987 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:08,991 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 29 treesize of output 23 [2021-06-12 19:58:08,992 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:08,995 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 20 treesize of output 16 [2021-06-12 19:58:08,996 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,181 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-12 19:58:09,181 INFO L628 ElimStorePlain]: treesize reduction 110, result has 65.0 percent of original size [2021-06-12 19:58:09,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,186 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 9 treesize of output 3 [2021-06-12 19:58:09,187 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,191 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 11 treesize of output 3 [2021-06-12 19:58:09,191 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,195 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 [2021-06-12 19:58:09,196 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:58:09,272 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:459, output treesize:96 [2021-06-12 19:58:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561975831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:09,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:09,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547635671] [2021-06-12 19:58:09,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:09,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:09,371 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) [2021-06-12 19:58:10,017 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 97 [2021-06-12 19:58:10,318 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 98 [2021-06-12 19:58:10,638 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 106 [2021-06-12 19:58:10,842 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 101 [2021-06-12 19:58:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:10,913 INFO L93 Difference]: Finished difference Result 476 states and 1381 transitions. [2021-06-12 19:58:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:10,914 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 [2021-06-12 19:58:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:10,914 INFO L225 Difference]: With dead ends: 476 [2021-06-12 19:58:10,914 INFO L226 Difference]: Without dead ends: 464 [2021-06-12 19:58:10,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1653.5ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-12 19:58:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 333. [2021-06-12 19:58:10,918 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) [2021-06-12 19:58:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 1010 transitions. [2021-06-12 19:58:10,919 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 1010 transitions. Word has length 18 [2021-06-12 19:58:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:10,919 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 1010 transitions. [2021-06-12 19:58:10,919 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) [2021-06-12 19:58:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 1010 transitions. [2021-06-12 19:58:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:10,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:10,919 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:11,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5183,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:11,120 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash 894124172, now seen corresponding path program 154 times [2021-06-12 19:58:11,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:11,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122812883] [2021-06-12 19:58:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:11,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122812883] [2021-06-12 19:58:11,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122812883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344790432] [2021-06-12 19:58:11,232 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 [2021-06-12 19:58:11,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:11,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:11,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:11,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:11,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,464 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 15 treesize of output 11 [2021-06-12 19:58:11,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,468 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 16 treesize of output 12 [2021-06-12 19:58:11,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,472 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 [2021-06-12 19:58:11,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,476 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 16 treesize of output 12 [2021-06-12 19:58:11,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,480 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 [2021-06-12 19:58:11,481 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,484 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 26 treesize of output 20 [2021-06-12 19:58:11,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,579 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 19:58:11,584 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. [2021-06-12 19:58:11,584 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-06-12 19:58:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,765 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 [2021-06-12 19:58:11,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:58:11,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,826 INFO L628 ElimStorePlain]: treesize reduction 82, result has 48.4 percent of original size [2021-06-12 19:58:11,827 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:11,829 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 27 treesize of output 21 [2021-06-12 19:58:11,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:11,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,859 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 10 treesize of output 5 [2021-06-12 19:58:11,860 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:11,862 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 20 treesize of output 9 [2021-06-12 19:58:11,863 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,896 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 7 treesize of output 5 [2021-06-12 19:58:11,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:11,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:11,919 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1348 vanished before elimination [2021-06-12 19:58:11,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:11,921 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 19:58:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344790432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:11,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:11,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932826824] [2021-06-12 19:58:11,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:11,979 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) [2021-06-12 19:58:13,108 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 81 [2021-06-12 19:58:13,632 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-06-12 19:58:14,119 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 98 [2021-06-12 19:58:14,364 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-12 19:58:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:14,595 INFO L93 Difference]: Finished difference Result 690 states and 1971 transitions. [2021-06-12 19:58:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:58:14,595 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 [2021-06-12 19:58:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:14,596 INFO L225 Difference]: With dead ends: 690 [2021-06-12 19:58:14,596 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 19:58:14,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2464.5ms TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:58:14,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 19:58:14,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 350. [2021-06-12 19:58:14,600 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) [2021-06-12 19:58:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1070 transitions. [2021-06-12 19:58:14,601 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1070 transitions. Word has length 18 [2021-06-12 19:58:14,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:14,601 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1070 transitions. [2021-06-12 19:58:14,601 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) [2021-06-12 19:58:14,601 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1070 transitions. [2021-06-12 19:58:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:14,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:14,601 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:14,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5204 [2021-06-12 19:58:14,802 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:14,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1919605254, now seen corresponding path program 155 times [2021-06-12 19:58:14,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:14,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789463147] [2021-06-12 19:58:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:14,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:14,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789463147] [2021-06-12 19:58:14,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789463147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:14,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580809571] [2021-06-12 19:58:14,928 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 [2021-06-12 19:58:14,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:14,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:14,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,169 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 15 treesize of output 11 [2021-06-12 19:58:15,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,173 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 16 treesize of output 12 [2021-06-12 19:58:15,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,177 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 15 treesize of output 11 [2021-06-12 19:58:15,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,181 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 16 treesize of output 12 [2021-06-12 19:58:15,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,185 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 25 treesize of output 19 [2021-06-12 19:58:15,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,189 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 [2021-06-12 19:58:15,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,285 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 19:58:15,289 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. [2021-06-12 19:58:15,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-06-12 19:58:15,486 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1357], 1=[array_2, v_prenex_1356]} [2021-06-12 19:58:15,488 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 25 treesize of output 19 [2021-06-12 19:58:15,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,492 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 15 treesize of output 11 [2021-06-12 19:58:15,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,521 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:58:15,523 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 [2021-06-12 19:58:15,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:15,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,538 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:15,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,541 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 10 treesize of output 5 [2021-06-12 19:58:15,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,543 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 20 treesize of output 9 [2021-06-12 19:58:15,544 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:15,564 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-12 19:58:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580809571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:15,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:15,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88053162] [2021-06-12 19:58:15,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:15,592 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) [2021-06-12 19:58:16,143 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-12 19:58:16,550 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 72 [2021-06-12 19:58:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:17,676 INFO L93 Difference]: Finished difference Result 670 states and 1934 transitions. [2021-06-12 19:58:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:58:17,676 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 [2021-06-12 19:58:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:17,677 INFO L225 Difference]: With dead ends: 670 [2021-06-12 19:58:17,677 INFO L226 Difference]: Without dead ends: 649 [2021-06-12 19:58:17,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1952.0ms TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:58:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-06-12 19:58:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 343. [2021-06-12 19:58:17,681 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) [2021-06-12 19:58:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 1046 transitions. [2021-06-12 19:58:17,682 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 1046 transitions. Word has length 18 [2021-06-12 19:58:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:17,682 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 1046 transitions. [2021-06-12 19:58:17,682 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) [2021-06-12 19:58:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 1046 transitions. [2021-06-12 19:58:17,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:17,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:17,682 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:17,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5230 [2021-06-12 19:58:17,883 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1803907236, now seen corresponding path program 156 times [2021-06-12 19:58:17,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:17,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956627410] [2021-06-12 19:58:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956627410] [2021-06-12 19:58:17,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956627410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930855887] [2021-06-12 19:58:17,995 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 [2021-06-12 19:58:18,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,227 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 15 treesize of output 11 [2021-06-12 19:58:18,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,231 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 16 treesize of output 12 [2021-06-12 19:58:18,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,235 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 [2021-06-12 19:58:18,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,239 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 15 treesize of output 11 [2021-06-12 19:58:18,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,243 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 [2021-06-12 19:58:18,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,247 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 [2021-06-12 19:58:18,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,343 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-06-12 19:58:18,346 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. [2021-06-12 19:58:18,347 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:189, output treesize:121 [2021-06-12 19:58:18,530 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1365], 1=[array_2, v_prenex_1364]} [2021-06-12 19:58:18,533 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 25 treesize of output 19 [2021-06-12 19:58:18,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,536 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 15 treesize of output 11 [2021-06-12 19:58:18,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,567 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:58:18,568 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 [2021-06-12 19:58:18,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:18,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,583 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:18,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,586 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 20 treesize of output 9 [2021-06-12 19:58:18,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,590 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 10 treesize of output 5 [2021-06-12 19:58:18,590 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:18,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:18,617 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:22 [2021-06-12 19:58:18,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930855887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:18,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:18,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051681422] [2021-06-12 19:58:18,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:18,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:18,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:18,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:18,647 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) [2021-06-12 19:58:19,312 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-12 19:58:20,066 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-12 19:58:20,496 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-12 19:58:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:20,965 INFO L93 Difference]: Finished difference Result 740 states and 2109 transitions. [2021-06-12 19:58:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:58:20,965 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 [2021-06-12 19:58:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:20,966 INFO L225 Difference]: With dead ends: 740 [2021-06-12 19:58:20,966 INFO L226 Difference]: Without dead ends: 719 [2021-06-12 19:58:20,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2060.8ms TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:58:20,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-12 19:58:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 342. [2021-06-12 19:58:20,971 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) [2021-06-12 19:58:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1046 transitions. [2021-06-12 19:58:20,971 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1046 transitions. Word has length 18 [2021-06-12 19:58:20,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:20,971 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 1046 transitions. [2021-06-12 19:58:20,971 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) [2021-06-12 19:58:20,971 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1046 transitions. [2021-06-12 19:58:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:20,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:20,972 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:21,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5253,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:21,172 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1605107838, now seen corresponding path program 157 times [2021-06-12 19:58:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526686205] [2021-06-12 19:58:21,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:21,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:21,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:21,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526686205] [2021-06-12 19:58:21,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526686205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575234016] [2021-06-12 19:58:21,287 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 [2021-06-12 19:58:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:21,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,407 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 [2021-06-12 19:58:21,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,410 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 25 treesize of output 19 [2021-06-12 19:58:21,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,413 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 24 treesize of output 18 [2021-06-12 19:58:21,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,460 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.2 percent of original size [2021-06-12 19:58:21,462 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. [2021-06-12 19:58:21,462 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:60 [2021-06-12 19:58:21,595 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1368], 1=[array_0, v_prenex_1367]} [2021-06-12 19:58:21,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:21,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:21,601 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 25 treesize of output 19 [2021-06-12 19:58:21,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,640 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 19:58:21,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:21,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,668 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 11 treesize of output 3 [2021-06-12 19:58:21,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:21,671 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 21 treesize of output 7 [2021-06-12 19:58:21,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:21,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:21,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1367 vanished before elimination [2021-06-12 19:58:21,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:21,692 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:58:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575234016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:21,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:21,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807981256] [2021-06-12 19:58:21,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:21,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:21,712 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) [2021-06-12 19:58:23,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:23,076 INFO L93 Difference]: Finished difference Result 627 states and 1829 transitions. [2021-06-12 19:58:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:23,076 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 [2021-06-12 19:58:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:23,077 INFO L225 Difference]: With dead ends: 627 [2021-06-12 19:58:23,077 INFO L226 Difference]: Without dead ends: 602 [2021-06-12 19:58:23,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:58:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-12 19:58:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 367. [2021-06-12 19:58:23,081 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) [2021-06-12 19:58:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1134 transitions. [2021-06-12 19:58:23,082 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1134 transitions. Word has length 18 [2021-06-12 19:58:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:23,082 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 1134 transitions. [2021-06-12 19:58:23,082 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) [2021-06-12 19:58:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1134 transitions. [2021-06-12 19:58:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:23,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:23,083 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:23,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5276 [2021-06-12 19:58:23,283 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash -343958516, now seen corresponding path program 158 times [2021-06-12 19:58:23,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:23,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444084241] [2021-06-12 19:58:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:23,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:23,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444084241] [2021-06-12 19:58:23,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444084241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919471588] [2021-06-12 19:58:23,365 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 [2021-06-12 19:58:23,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:23,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:23,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:23,454 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 24 treesize of output 18 [2021-06-12 19:58:23,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:23,458 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 [2021-06-12 19:58:23,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,461 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 15 treesize of output 11 [2021-06-12 19:58:23,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,500 INFO L628 ElimStorePlain]: treesize reduction 33, result has 63.7 percent of original size [2021-06-12 19:58:23,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:23,501 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-06-12 19:58:23,574 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 27 treesize of output 21 [2021-06-12 19:58:23,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:23,584 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 19:58:23,584 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:23,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:23,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 19:58:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:23,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919471588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:23,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 19:58:23,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093059084] [2021-06-12 19:58:23,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:23,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:23,602 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) [2021-06-12 19:58:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:23,918 INFO L93 Difference]: Finished difference Result 503 states and 1508 transitions. [2021-06-12 19:58:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:23,919 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 [2021-06-12 19:58:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:23,919 INFO L225 Difference]: With dead ends: 503 [2021-06-12 19:58:23,919 INFO L226 Difference]: Without dead ends: 492 [2021-06-12 19:58:23,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-12 19:58:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 379. [2021-06-12 19:58:23,923 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) [2021-06-12 19:58:23,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1174 transitions. [2021-06-12 19:58:23,923 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1174 transitions. Word has length 18 [2021-06-12 19:58:23,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:23,923 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1174 transitions. [2021-06-12 19:58:23,923 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) [2021-06-12 19:58:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1174 transitions. [2021-06-12 19:58:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:23,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:23,924 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:24,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5292,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:24,124 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2011020034, now seen corresponding path program 159 times [2021-06-12 19:58:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303458357] [2021-06-12 19:58:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303458357] [2021-06-12 19:58:24,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303458357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089684242] [2021-06-12 19:58:24,203 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 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 [2021-06-12 19:58:24,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:24,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:24,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:24,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:24,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:24,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:24,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,299 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 15 treesize of output 11 [2021-06-12 19:58:24,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,340 INFO L628 ElimStorePlain]: treesize reduction 37, result has 64.1 percent of original size [2021-06-12 19:58:24,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:24,340 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:66 [2021-06-12 19:58:24,387 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1369], 1=[v_prenex_1370, array_4]} [2021-06-12 19:58:24,390 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 15 treesize of output 11 [2021-06-12 19:58:24,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:24,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,429 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-06-12 19:58:24,431 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 [2021-06-12 19:58:24,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:24,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:24,451 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 [2021-06-12 19:58:24,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,454 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 [2021-06-12 19:58:24,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:24,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:24,477 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:24,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:24,477 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:153, output treesize:44 [2021-06-12 19:58:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089684242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:24,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 19:58:24,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173002157] [2021-06-12 19:58:24,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:58:24,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:58:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:58:24,546 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) [2021-06-12 19:58:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:24,890 INFO L93 Difference]: Finished difference Result 507 states and 1525 transitions. [2021-06-12 19:58:24,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:24,890 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 [2021-06-12 19:58:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:24,891 INFO L225 Difference]: With dead ends: 507 [2021-06-12 19:58:24,891 INFO L226 Difference]: Without dead ends: 502 [2021-06-12 19:58:24,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:24,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-12 19:58:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 374. [2021-06-12 19:58:24,895 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) [2021-06-12 19:58:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1157 transitions. [2021-06-12 19:58:24,895 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1157 transitions. Word has length 18 [2021-06-12 19:58:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:24,895 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1157 transitions. [2021-06-12 19:58:24,895 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) [2021-06-12 19:58:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1157 transitions. [2021-06-12 19:58:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:24,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:24,896 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:25,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5301,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:25,096 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:25,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1137279354, now seen corresponding path program 160 times [2021-06-12 19:58:25,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:25,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56361233] [2021-06-12 19:58:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:25,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56361233] [2021-06-12 19:58:25,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56361233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011861302] [2021-06-12 19:58:25,175 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 [2021-06-12 19:58:25,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:25,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:25,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:25,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,307 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 15 treesize of output 11 [2021-06-12 19:58:25,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,309 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 [2021-06-12 19:58:25,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:25,330 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. [2021-06-12 19:58:25,330 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:70, output treesize:56 [2021-06-12 19:58:25,381 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 19:58:25,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,385 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 24 treesize of output 18 [2021-06-12 19:58:25,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,389 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 [2021-06-12 19:58:25,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,408 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 [2021-06-12 19:58:25,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,412 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 35 treesize of output 27 [2021-06-12 19:58:25,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 19:58:25,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,417 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 [2021-06-12 19:58:25,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,421 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 34 treesize of output 26 [2021-06-12 19:58:25,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,496 INFO L628 ElimStorePlain]: treesize reduction 218, result has 26.4 percent of original size [2021-06-12 19:58:25,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 19:58:25,500 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,502 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 [2021-06-12 19:58:25,503 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:25,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:25,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:25,530 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-12 19:58:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011861302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:25,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:25,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945802775] [2021-06-12 19:58:25,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:25,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:25,589 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) [2021-06-12 19:58:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:26,230 INFO L93 Difference]: Finished difference Result 547 states and 1651 transitions. [2021-06-12 19:58:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:26,230 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 [2021-06-12 19:58:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:26,231 INFO L225 Difference]: With dead ends: 547 [2021-06-12 19:58:26,231 INFO L226 Difference]: Without dead ends: 539 [2021-06-12 19:58:26,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-12 19:58:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 376. [2021-06-12 19:58:26,235 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) [2021-06-12 19:58:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1171 transitions. [2021-06-12 19:58:26,235 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1171 transitions. Word has length 18 [2021-06-12 19:58:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:26,235 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1171 transitions. [2021-06-12 19:58:26,235 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) [2021-06-12 19:58:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1171 transitions. [2021-06-12 19:58:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:26,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:26,236 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:26,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5311 [2021-06-12 19:58:26,436 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 193897062, now seen corresponding path program 161 times [2021-06-12 19:58:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593198481] [2021-06-12 19:58:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:26,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:26,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593198481] [2021-06-12 19:58:26,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593198481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188128522] [2021-06-12 19:58:26,520 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 [2021-06-12 19:58:26,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:26,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:26,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:26,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:26,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,653 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 17 treesize of output 13 [2021-06-12 19:58:26,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,656 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 15 treesize of output 11 [2021-06-12 19:58:26,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,677 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. [2021-06-12 19:58:26,677 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 19:58:26,760 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-06-12 19:58:26,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,763 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 15 treesize of output 11 [2021-06-12 19:58:26,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,767 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 25 treesize of output 19 [2021-06-12 19:58:26,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,770 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 27 treesize of output 21 [2021-06-12 19:58:26,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:26,774 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 17 treesize of output 13 [2021-06-12 19:58:26,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,849 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 19:58:26,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,852 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 [2021-06-12 19:58:26,853 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,856 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 [2021-06-12 19:58:26,856 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:26,865 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 9 treesize of output 3 [2021-06-12 19:58:26,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:26,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:26,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:26,898 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-12 19:58:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188128522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:26,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:26,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185896126] [2021-06-12 19:58:26,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:26,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:26,973 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) [2021-06-12 19:58:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:27,680 INFO L93 Difference]: Finished difference Result 537 states and 1622 transitions. [2021-06-12 19:58:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:27,681 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 [2021-06-12 19:58:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:27,682 INFO L225 Difference]: With dead ends: 537 [2021-06-12 19:58:27,682 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 19:58:27,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 19:58:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2021-06-12 19:58:27,685 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) [2021-06-12 19:58:27,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1189 transitions. [2021-06-12 19:58:27,686 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1189 transitions. Word has length 18 [2021-06-12 19:58:27,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:27,686 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1189 transitions. [2021-06-12 19:58:27,686 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) [2021-06-12 19:58:27,686 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1189 transitions. [2021-06-12 19:58:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:27,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:27,687 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:27,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5322 [2021-06-12 19:58:27,887 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:27,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1675134932, now seen corresponding path program 162 times [2021-06-12 19:58:27,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:27,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907554491] [2021-06-12 19:58:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:27,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907554491] [2021-06-12 19:58:27,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907554491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327548592] [2021-06-12 19:58:27,965 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 [2021-06-12 19:58:27,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:27,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:27,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,063 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 25 treesize of output 19 [2021-06-12 19:58:28,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,066 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 15 treesize of output 11 [2021-06-12 19:58:28,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:28,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 19:58:28,123 INFO L446 ElimStorePlain]: Different costs {0=[array_2, v_prenex_1373], 1=[v_prenex_1374, array_4]} [2021-06-12 19:58:28,125 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 17 treesize of output 13 [2021-06-12 19:58:28,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:28,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,163 INFO L628 ElimStorePlain]: treesize reduction 62, result has 44.1 percent of original size [2021-06-12 19:58:28,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:28,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:28,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:28,186 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 11 treesize of output 3 [2021-06-12 19:58:28,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,188 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 21 treesize of output 7 [2021-06-12 19:58:28,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:28,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:28,211 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:28,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:28,212 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:125, output treesize:38 [2021-06-12 19:58:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:28,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327548592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:28,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:28,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:58:28,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719217915] [2021-06-12 19:58:28,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:28,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:28,277 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) [2021-06-12 19:58:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:28,721 INFO L93 Difference]: Finished difference Result 578 states and 1733 transitions. [2021-06-12 19:58:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:58:28,721 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 [2021-06-12 19:58:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:28,722 INFO L225 Difference]: With dead ends: 578 [2021-06-12 19:58:28,722 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 19:58:28,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:28,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 19:58:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 388. [2021-06-12 19:58:28,726 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) [2021-06-12 19:58:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1213 transitions. [2021-06-12 19:58:28,727 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1213 transitions. Word has length 18 [2021-06-12 19:58:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:28,727 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1213 transitions. [2021-06-12 19:58:28,727 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) [2021-06-12 19:58:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1213 transitions. [2021-06-12 19:58:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:28,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:28,728 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:28,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5336,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:28,928 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash 4158916, now seen corresponding path program 163 times [2021-06-12 19:58:28,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:28,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157435101] [2021-06-12 19:58:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:29,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157435101] [2021-06-12 19:58:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157435101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46674602] [2021-06-12 19:58:29,004 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 [2021-06-12 19:58:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:29,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:29,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:29,112 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 [2021-06-12 19:58:29,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,114 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 15 treesize of output 11 [2021-06-12 19:58:29,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:29,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:29,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:29,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:67, output treesize:53 [2021-06-12 19:58:29,195 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 27 treesize of output 21 [2021-06-12 19:58:29,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:29,205 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 19:58:29,205 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:29,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:29,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 19:58:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46674602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:29,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:58:29,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043304845] [2021-06-12 19:58:29,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:29,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:29,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:29,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:29,225 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) [2021-06-12 19:58:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:29,605 INFO L93 Difference]: Finished difference Result 536 states and 1614 transitions. [2021-06-12 19:58:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:29,605 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 [2021-06-12 19:58:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:29,606 INFO L225 Difference]: With dead ends: 536 [2021-06-12 19:58:29,606 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 19:58:29,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 19:58:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 376. [2021-06-12 19:58:29,610 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) [2021-06-12 19:58:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1171 transitions. [2021-06-12 19:58:29,611 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1171 transitions. Word has length 18 [2021-06-12 19:58:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:29,611 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1171 transitions. [2021-06-12 19:58:29,611 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) [2021-06-12 19:58:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1171 transitions. [2021-06-12 19:58:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:29,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:29,611 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:29,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5345,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:29,812 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:29,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:29,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1103680126, now seen corresponding path program 164 times [2021-06-12 19:58:29,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:29,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694467806] [2021-06-12 19:58:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:29,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694467806] [2021-06-12 19:58:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694467806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109420357] [2021-06-12 19:58:29,900 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 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 [2021-06-12 19:58:29,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:29,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:29,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:30,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:58:30,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,041 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 25 treesize of output 19 [2021-06-12 19:58:30,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,064 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. [2021-06-12 19:58:30,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:59 [2021-06-12 19:58:30,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,165 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 [2021-06-12 19:58:30,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,169 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 15 treesize of output 11 [2021-06-12 19:58:30,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,219 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-12 19:58:30,219 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:30,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,221 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 27 treesize of output 21 [2021-06-12 19:58:30,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:30,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,247 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 [2021-06-12 19:58:30,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,249 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 [2021-06-12 19:58:30,250 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:30,278 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-12 19:58:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:30,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109420357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:30,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:30,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:30,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232627360] [2021-06-12 19:58:30,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:30,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:30,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:30,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:30,338 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) [2021-06-12 19:58:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:31,119 INFO L93 Difference]: Finished difference Result 587 states and 1767 transitions. [2021-06-12 19:58:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:58:31,120 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 [2021-06-12 19:58:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:31,120 INFO L225 Difference]: With dead ends: 587 [2021-06-12 19:58:31,121 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 19:58:31,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 19:58:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 377. [2021-06-12 19:58:31,126 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) [2021-06-12 19:58:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1179 transitions. [2021-06-12 19:58:31,127 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1179 transitions. Word has length 18 [2021-06-12 19:58:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:31,127 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1179 transitions. [2021-06-12 19:58:31,127 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) [2021-06-12 19:58:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1179 transitions. [2021-06-12 19:58:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:31,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:31,128 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:31,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5354 [2021-06-12 19:58:31,341 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:31,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1115191326, now seen corresponding path program 165 times [2021-06-12 19:58:31,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:31,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907696101] [2021-06-12 19:58:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:31,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:31,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907696101] [2021-06-12 19:58:31,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907696101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:31,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187760668] [2021-06-12 19:58:31,554 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 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 [2021-06-12 19:58:31,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:31,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:31,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:31,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:31,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,783 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 26 treesize of output 20 [2021-06-12 19:58:31,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,787 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 16 treesize of output 12 [2021-06-12 19:58:31,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:58:31,791 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,795 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 25 treesize of output 19 [2021-06-12 19:58:31,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,799 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 15 treesize of output 11 [2021-06-12 19:58:31,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:31,802 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 [2021-06-12 19:58:31,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:31,895 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 19:58:31,899 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. [2021-06-12 19:58:31,899 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-12 19:58:32,077 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:58:32,079 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 25 treesize of output 19 [2021-06-12 19:58:32,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,081 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 [2021-06-12 19:58:32,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:32,102 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:58:32,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:32,104 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 [2021-06-12 19:58:32,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:32,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:32,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:32,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:58:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:32,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187760668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:32,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612633762] [2021-06-12 19:58:32,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:32,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:32,134 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) [2021-06-12 19:58:32,491 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-06-12 19:58:32,659 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-12 19:58:33,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:33,087 INFO L93 Difference]: Finished difference Result 584 states and 1727 transitions. [2021-06-12 19:58:33,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:33,087 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 [2021-06-12 19:58:33,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:33,088 INFO L225 Difference]: With dead ends: 584 [2021-06-12 19:58:33,088 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 19:58:33,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1083.6ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 19:58:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 380. [2021-06-12 19:58:33,092 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) [2021-06-12 19:58:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1186 transitions. [2021-06-12 19:58:33,092 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1186 transitions. Word has length 18 [2021-06-12 19:58:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:33,093 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1186 transitions. [2021-06-12 19:58:33,093 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) [2021-06-12 19:58:33,093 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1186 transitions. [2021-06-12 19:58:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:33,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:33,093 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:33,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5367,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:33,294 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash -833875028, now seen corresponding path program 166 times [2021-06-12 19:58:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:33,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28582237] [2021-06-12 19:58:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:33,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28582237] [2021-06-12 19:58:33,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28582237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899986871] [2021-06-12 19:58:33,403 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 [2021-06-12 19:58:33,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:33,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,632 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 15 treesize of output 11 [2021-06-12 19:58:33,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,636 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 26 treesize of output 20 [2021-06-12 19:58:33,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,640 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 16 treesize of output 12 [2021-06-12 19:58:33,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,644 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 25 treesize of output 19 [2021-06-12 19:58:33,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,648 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 16 treesize of output 12 [2021-06-12 19:58:33,648 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,651 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 [2021-06-12 19:58:33,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,749 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 19:58:33,753 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. [2021-06-12 19:58:33,753 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-12 19:58:33,948 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:58:33,950 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 25 treesize of output 19 [2021-06-12 19:58:33,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:33,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:33,974 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:58:33,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,976 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 [2021-06-12 19:58:33,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:33,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:33,983 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:58:34,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:34,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899986871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:34,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:34,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:34,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12392381] [2021-06-12 19:58:34,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:34,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:34,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:34,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:34,005 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) [2021-06-12 19:58:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:34,827 INFO L93 Difference]: Finished difference Result 587 states and 1756 transitions. [2021-06-12 19:58:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:34,827 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 [2021-06-12 19:58:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:34,828 INFO L225 Difference]: With dead ends: 587 [2021-06-12 19:58:34,828 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 19:58:34,828 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 900.0ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 19:58:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 382. [2021-06-12 19:58:34,832 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) [2021-06-12 19:58:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1191 transitions. [2021-06-12 19:58:34,833 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1191 transitions. Word has length 18 [2021-06-12 19:58:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:34,833 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1191 transitions. [2021-06-12 19:58:34,833 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) [2021-06-12 19:58:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1191 transitions. [2021-06-12 19:58:34,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:34,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:34,833 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:35,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5387 [2021-06-12 19:58:35,034 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:35,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:35,034 INFO L82 PathProgramCache]: Analyzing trace with hash 647362842, now seen corresponding path program 167 times [2021-06-12 19:58:35,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:35,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890083784] [2021-06-12 19:58:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:35,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890083784] [2021-06-12 19:58:35,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890083784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935822525] [2021-06-12 19:58:35,157 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 [2021-06-12 19:58:35,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:35,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:35,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,391 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 25 treesize of output 19 [2021-06-12 19:58:35,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,395 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 16 treesize of output 12 [2021-06-12 19:58:35,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,400 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 [2021-06-12 19:58:35,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,404 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 [2021-06-12 19:58:35,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,408 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 26 treesize of output 20 [2021-06-12 19:58:35,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,412 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 15 treesize of output 11 [2021-06-12 19:58:35,413 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,508 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.5 percent of original size [2021-06-12 19:58:35,511 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. [2021-06-12 19:58:35,512 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:193, output treesize:125 [2021-06-12 19:58:35,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,676 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 [2021-06-12 19:58:35,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,680 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 27 treesize of output 21 [2021-06-12 19:58:35,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:35,748 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-06-12 19:58:35,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:35,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,779 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 11 treesize of output 3 [2021-06-12 19:58:35,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,782 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 21 treesize of output 7 [2021-06-12 19:58:35,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,816 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 7 treesize of output 5 [2021-06-12 19:58:35,817 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:35,840 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1397 vanished before elimination [2021-06-12 19:58:35,840 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1399 vanished before elimination [2021-06-12 19:58:35,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:35,841 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:58:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935822525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:35,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:35,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224641466] [2021-06-12 19:58:35,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:35,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:35,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:35,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:35,906 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) [2021-06-12 19:58:36,671 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2021-06-12 19:58:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:36,797 INFO L93 Difference]: Finished difference Result 586 states and 1754 transitions. [2021-06-12 19:58:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:36,798 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 [2021-06-12 19:58:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:36,798 INFO L225 Difference]: With dead ends: 586 [2021-06-12 19:58:36,798 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 19:58:36,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1002.8ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 19:58:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 377. [2021-06-12 19:58:36,802 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) [2021-06-12 19:58:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1179 transitions. [2021-06-12 19:58:36,803 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1179 transitions. Word has length 18 [2021-06-12 19:58:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:36,803 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1179 transitions. [2021-06-12 19:58:36,803 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) [2021-06-12 19:58:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1179 transitions. [2021-06-12 19:58:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:36,803 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:36,803 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:37,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5407,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:37,004 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1906960408, now seen corresponding path program 168 times [2021-06-12 19:58:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:37,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391438208] [2021-06-12 19:58:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391438208] [2021-06-12 19:58:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391438208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562371308] [2021-06-12 19:58:37,128 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 [2021-06-12 19:58:37,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:37,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:37,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:37,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:37,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,402 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 16 treesize of output 12 [2021-06-12 19:58:37,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,406 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 15 treesize of output 11 [2021-06-12 19:58:37,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,411 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 15 treesize of output 11 [2021-06-12 19:58:37,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,415 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 25 treesize of output 19 [2021-06-12 19:58:37,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,420 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 [2021-06-12 19:58:37,420 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,423 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 16 treesize of output 12 [2021-06-12 19:58:37,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,539 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:58:37,539 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:58:37,543 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. [2021-06-12 19:58:37,543 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:58:37,700 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 19:58:37,702 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 25 treesize of output 19 [2021-06-12 19:58:37,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:37,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:37,725 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 19:58:37,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:37,727 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 [2021-06-12 19:58:37,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:37,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:37,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:37,734 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 19:58:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562371308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:37,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:37,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086412035] [2021-06-12 19:58:37,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:37,755 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) [2021-06-12 19:58:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:38,581 INFO L93 Difference]: Finished difference Result 555 states and 1679 transitions. [2021-06-12 19:58:38,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:38,581 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 [2021-06-12 19:58:38,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:38,582 INFO L225 Difference]: With dead ends: 555 [2021-06-12 19:58:38,582 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 19:58:38,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 972.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 19:58:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 381. [2021-06-12 19:58:38,586 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) [2021-06-12 19:58:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1189 transitions. [2021-06-12 19:58:38,586 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1189 transitions. Word has length 18 [2021-06-12 19:58:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:38,586 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1189 transitions. [2021-06-12 19:58:38,586 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) [2021-06-12 19:58:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1189 transitions. [2021-06-12 19:58:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:38,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:38,587 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:38,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5429,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:38,787 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash -425722538, now seen corresponding path program 169 times [2021-06-12 19:58:38,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:38,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512607405] [2021-06-12 19:58:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:38,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512607405] [2021-06-12 19:58:38,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512607405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055663999] [2021-06-12 19:58:38,950 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 [2021-06-12 19:58:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:38,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:38,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,314 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 16 treesize of output 12 [2021-06-12 19:58:39,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,318 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 [2021-06-12 19:58:39,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,323 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 15 treesize of output 11 [2021-06-12 19:58:39,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,327 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 [2021-06-12 19:58:39,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,331 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 26 treesize of output 20 [2021-06-12 19:58:39,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,335 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 16 treesize of output 12 [2021-06-12 19:58:39,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,443 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:58:39,443 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:58:39,447 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. [2021-06-12 19:58:39,447 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:58:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,569 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 17 treesize of output 13 [2021-06-12 19:58:39,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,573 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 [2021-06-12 19:58:39,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,633 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-12 19:58:39,633 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:39,636 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 27 treesize of output 21 [2021-06-12 19:58:39,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:39,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,665 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 21 treesize of output 7 [2021-06-12 19:58:39,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:39,669 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 11 treesize of output 3 [2021-06-12 19:58:39,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,702 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 7 treesize of output 5 [2021-06-12 19:58:39,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:39,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:39,731 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1414 vanished before elimination [2021-06-12 19:58:39,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:39,732 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:58:39,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:39,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055663999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:39,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:39,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:39,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72216266] [2021-06-12 19:58:39,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:39,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:39,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:39,791 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) [2021-06-12 19:58:40,257 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-12 19:58:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:40,618 INFO L93 Difference]: Finished difference Result 528 states and 1598 transitions. [2021-06-12 19:58:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:40,618 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 [2021-06-12 19:58:40,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:40,619 INFO L225 Difference]: With dead ends: 528 [2021-06-12 19:58:40,619 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 19:58:40,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1092.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:58:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 19:58:40,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 379. [2021-06-12 19:58:40,622 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) [2021-06-12 19:58:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1184 transitions. [2021-06-12 19:58:40,623 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1184 transitions. Word has length 18 [2021-06-12 19:58:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:40,623 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1184 transitions. [2021-06-12 19:58:40,623 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) [2021-06-12 19:58:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1184 transitions. [2021-06-12 19:58:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:40,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:40,624 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:40,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5445,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:40,824 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:40,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1741879842, now seen corresponding path program 170 times [2021-06-12 19:58:40,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:40,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819518810] [2021-06-12 19:58:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:40,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:40,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819518810] [2021-06-12 19:58:40,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819518810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896051562] [2021-06-12 19:58:40,948 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 [2021-06-12 19:58:40,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:40,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:40,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:40,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:41,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,227 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 17 treesize of output 13 [2021-06-12 19:58:41,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,231 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 15 treesize of output 11 [2021-06-12 19:58:41,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,290 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 17 treesize of output 13 [2021-06-12 19:58:41,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,293 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 15 treesize of output 11 [2021-06-12 19:58:41,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,354 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 [2021-06-12 19:58:41,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:41,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,358 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 25 treesize of output 19 [2021-06-12 19:58:41,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,417 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. [2021-06-12 19:58:41,417 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-12 19:58:41,577 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 19:58:41,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,581 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 25 treesize of output 19 [2021-06-12 19:58:41,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,586 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 [2021-06-12 19:58:41,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,590 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 17 treesize of output 13 [2021-06-12 19:58:41,591 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,595 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 28 treesize of output 22 [2021-06-12 19:58:41,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,599 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 16 treesize of output 12 [2021-06-12 19:58:41,600 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,604 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 20 treesize of output 16 [2021-06-12 19:58:41,605 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,609 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 19 treesize of output 15 [2021-06-12 19:58:41,609 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,613 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 15 treesize of output 11 [2021-06-12 19:58:41,614 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,618 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 18 treesize of output 14 [2021-06-12 19:58:41,618 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,622 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 16 treesize of output 12 [2021-06-12 19:58:41,623 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,627 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 26 treesize of output 20 [2021-06-12 19:58:41,628 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,631 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 29 treesize of output 23 [2021-06-12 19:58:41,632 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,763 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-12 19:58:41,763 INFO L628 ElimStorePlain]: treesize reduction 109, result has 57.1 percent of original size [2021-06-12 19:58:41,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,767 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 11 treesize of output 3 [2021-06-12 19:58:41,768 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,772 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 9 treesize of output 3 [2021-06-12 19:58:41,772 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,775 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 21 treesize of output 7 [2021-06-12 19:58:41,776 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:41,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:58:41,827 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-06-12 19:58:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896051562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:41,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541759648] [2021-06-12 19:58:41,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:41,914 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) [2021-06-12 19:58:42,667 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 94 [2021-06-12 19:58:42,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,920 INFO L93 Difference]: Finished difference Result 556 states and 1682 transitions. [2021-06-12 19:58:42,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:42,921 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 [2021-06-12 19:58:42,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,921 INFO L225 Difference]: With dead ends: 556 [2021-06-12 19:58:42,921 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 19:58:42,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1125.8ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:58:42,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 19:58:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 374. [2021-06-12 19:58:42,927 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) [2021-06-12 19:58:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1172 transitions. [2021-06-12 19:58:42,927 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1172 transitions. Word has length 18 [2021-06-12 19:58:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,927 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1172 transitions. [2021-06-12 19:58:42,927 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) [2021-06-12 19:58:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1172 transitions. [2021-06-12 19:58:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:42,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,928 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:43,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5467,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:43,128 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1529859260, now seen corresponding path program 171 times [2021-06-12 19:58:43,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:43,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387987836] [2021-06-12 19:58:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387987836] [2021-06-12 19:58:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387987836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455448479] [2021-06-12 19:58:43,216 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 [2021-06-12 19:58:43,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:43,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:43,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:43,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:43,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,306 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 [2021-06-12 19:58:43,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,308 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 25 treesize of output 19 [2021-06-12 19:58:43,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,311 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 18 [2021-06-12 19:58:43,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,344 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.6 percent of original size [2021-06-12 19:58:43,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:43,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-06-12 19:58:43,423 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 27 treesize of output 21 [2021-06-12 19:58:43,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:43,433 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 19:58:43,433 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:43,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:43,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 19:58:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455448479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:43,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:58:43,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295238684] [2021-06-12 19:58:43,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:43,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:43,452 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) [2021-06-12 19:58:43,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:43,833 INFO L93 Difference]: Finished difference Result 582 states and 1750 transitions. [2021-06-12 19:58:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:43,833 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 [2021-06-12 19:58:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:43,834 INFO L225 Difference]: With dead ends: 582 [2021-06-12 19:58:43,834 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 19:58:43,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 19:58:43,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 378. [2021-06-12 19:58:43,838 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) [2021-06-12 19:58:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1192 transitions. [2021-06-12 19:58:43,838 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1192 transitions. Word has length 18 [2021-06-12 19:58:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:43,839 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1192 transitions. [2021-06-12 19:58:43,839 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) [2021-06-12 19:58:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1192 transitions. [2021-06-12 19:58:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:43,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:43,839 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:44,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5496 [2021-06-12 19:58:44,040 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:44,040 INFO L82 PathProgramCache]: Analyzing trace with hash -673363314, now seen corresponding path program 172 times [2021-06-12 19:58:44,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:44,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688375676] [2021-06-12 19:58:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:44,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:44,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688375676] [2021-06-12 19:58:44,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688375676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350467887] [2021-06-12 19:58:44,141 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 [2021-06-12 19:58:44,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:44,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:44,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,272 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 [2021-06-12 19:58:44,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,277 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 24 treesize of output 18 [2021-06-12 19:58:44,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,282 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 [2021-06-12 19:58:44,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,341 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.2 percent of original size [2021-06-12 19:58:44,343 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. [2021-06-12 19:58:44,344 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:115, output treesize:60 [2021-06-12 19:58:44,532 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1427, array_4], 1=[array_0, v_prenex_1426]} [2021-06-12 19:58:44,535 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 27 treesize of output 21 [2021-06-12 19:58:44,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:44,538 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 25 treesize of output 19 [2021-06-12 19:58:44,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,578 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 19:58:44,580 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 [2021-06-12 19:58:44,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,596 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:58:44,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,598 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 11 treesize of output 3 [2021-06-12 19:58:44,599 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:44,601 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 21 treesize of output 7 [2021-06-12 19:58:44,601 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:44,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:44,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:44,622 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:58:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350467887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:44,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805556121] [2021-06-12 19:58:44,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:44,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:44,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:44,644 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) [2021-06-12 19:58:45,188 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2021-06-12 19:58:45,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:45,314 INFO L93 Difference]: Finished difference Result 579 states and 1746 transitions. [2021-06-12 19:58:45,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:45,314 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 [2021-06-12 19:58:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:45,315 INFO L225 Difference]: With dead ends: 579 [2021-06-12 19:58:45,315 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 19:58:45,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:45,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 19:58:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 381. [2021-06-12 19:58:45,319 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) [2021-06-12 19:58:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1204 transitions. [2021-06-12 19:58:45,319 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1204 transitions. Word has length 18 [2021-06-12 19:58:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:45,320 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1204 transitions. [2021-06-12 19:58:45,320 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) [2021-06-12 19:58:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1204 transitions. [2021-06-12 19:58:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:45,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:45,320 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:45,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5502,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:45,520 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:45,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1681615236, now seen corresponding path program 173 times [2021-06-12 19:58:45,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:45,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174783792] [2021-06-12 19:58:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:45,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174783792] [2021-06-12 19:58:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174783792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253082589] [2021-06-12 19:58:45,613 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 [2021-06-12 19:58:45,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:45,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:45,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:45,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:45,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,701 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 15 treesize of output 11 [2021-06-12 19:58:45,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,704 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 25 treesize of output 19 [2021-06-12 19:58:45,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,707 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 [2021-06-12 19:58:45,707 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,740 INFO L628 ElimStorePlain]: treesize reduction 28, result has 63.2 percent of original size [2021-06-12 19:58:45,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:45,741 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-06-12 19:58:45,819 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1428, array_0], 1=[v_prenex_1429, array_4]} [2021-06-12 19:58:45,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:45,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:45,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,860 INFO L628 ElimStorePlain]: treesize reduction 78, result has 38.6 percent of original size [2021-06-12 19:58:45,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:45,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:45,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1429 vanished before elimination [2021-06-12 19:58:45,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,882 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 11 treesize of output 3 [2021-06-12 19:58:45,883 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,884 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 21 treesize of output 7 [2021-06-12 19:58:45,885 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:45,908 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-06-12 19:58:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253082589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:45,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:58:45,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814374078] [2021-06-12 19:58:45,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:45,974 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) [2021-06-12 19:58:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:46,348 INFO L93 Difference]: Finished difference Result 585 states and 1770 transitions. [2021-06-12 19:58:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:46,348 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 [2021-06-12 19:58:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:46,349 INFO L225 Difference]: With dead ends: 585 [2021-06-12 19:58:46,349 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 19:58:46,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 404.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:58:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 19:58:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 370. [2021-06-12 19:58:46,353 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) [2021-06-12 19:58:46,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1165 transitions. [2021-06-12 19:58:46,353 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1165 transitions. Word has length 18 [2021-06-12 19:58:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:46,354 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1165 transitions. [2021-06-12 19:58:46,354 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) [2021-06-12 19:58:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1165 transitions. [2021-06-12 19:58:46,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:46,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:46,354 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:46,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5519 [2021-06-12 19:58:46,555 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash 816041682, now seen corresponding path program 174 times [2021-06-12 19:58:46,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:46,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868436256] [2021-06-12 19:58:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:46,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:46,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868436256] [2021-06-12 19:58:46,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868436256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71937734] [2021-06-12 19:58:46,643 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 [2021-06-12 19:58:46,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:58:46,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:46,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:46,749 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 24 treesize of output 18 [2021-06-12 19:58:46,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:46,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:46,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:46,800 INFO L628 ElimStorePlain]: treesize reduction 37, result has 64.1 percent of original size [2021-06-12 19:58:46,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:46,801 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:124, output treesize:66 [2021-06-12 19:58:46,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:46,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:46,878 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 19:58:46,878 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:58:46,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:46,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 19:58:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:46,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71937734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:46,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:46,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:58:46,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714459414] [2021-06-12 19:58:46,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:46,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:46,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:46,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:46,897 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) [2021-06-12 19:58:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:47,110 INFO L93 Difference]: Finished difference Result 537 states and 1634 transitions. [2021-06-12 19:58:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:47,110 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 [2021-06-12 19:58:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:47,111 INFO L225 Difference]: With dead ends: 537 [2021-06-12 19:58:47,111 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 19:58:47,111 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 19:58:47,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 382. [2021-06-12 19:58:47,115 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) [2021-06-12 19:58:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1205 transitions. [2021-06-12 19:58:47,115 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1205 transitions. Word has length 18 [2021-06-12 19:58:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:47,115 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1205 transitions. [2021-06-12 19:58:47,115 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) [2021-06-12 19:58:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1205 transitions. [2021-06-12 19:58:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:47,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:47,116 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:47,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5532,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,316 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1123947064, now seen corresponding path program 175 times [2021-06-12 19:58:47,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:47,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060216368] [2021-06-12 19:58:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060216368] [2021-06-12 19:58:47,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060216368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485602119] [2021-06-12 19:58:47,402 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 [2021-06-12 19:58:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:47,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,509 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 24 treesize of output 18 [2021-06-12 19:58:47,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,512 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 [2021-06-12 19:58:47,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,515 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 15 treesize of output 11 [2021-06-12 19:58:47,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,554 INFO L628 ElimStorePlain]: treesize reduction 33, result has 63.7 percent of original size [2021-06-12 19:58:47,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:47,559 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-06-12 19:58:47,601 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1430], 1=[array_4, v_prenex_1431]} [2021-06-12 19:58:47,603 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 25 treesize of output 19 [2021-06-12 19:58:47,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,606 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 35 treesize of output 27 [2021-06-12 19:58:47,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 19:58:47,656 INFO L628 ElimStorePlain]: treesize reduction 142, result has 34.0 percent of original size [2021-06-12 19:58:47,658 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 7 treesize of output 5 [2021-06-12 19:58:47,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,684 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 21 treesize of output 7 [2021-06-12 19:58:47,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,686 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 [2021-06-12 19:58:47,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:47,708 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1431 vanished before elimination [2021-06-12 19:58:47,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:47,709 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-06-12 19:58:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485602119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:47,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:58:47,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555563898] [2021-06-12 19:58:47,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:58:47,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:47,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:58:47,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:58:47,768 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) [2021-06-12 19:58:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:48,021 INFO L93 Difference]: Finished difference Result 541 states and 1651 transitions. [2021-06-12 19:58:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:48,021 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 [2021-06-12 19:58:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:48,022 INFO L225 Difference]: With dead ends: 541 [2021-06-12 19:58:48,022 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 19:58:48,022 INFO L728 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 [2021-06-12 19:58:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 19:58:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 376. [2021-06-12 19:58:48,025 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) [2021-06-12 19:58:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1183 transitions. [2021-06-12 19:58:48,026 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1183 transitions. Word has length 18 [2021-06-12 19:58:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:48,026 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1183 transitions. [2021-06-12 19:58:48,026 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) [2021-06-12 19:58:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1183 transitions. [2021-06-12 19:58:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:48,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:48,027 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:48,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-06-12 19:58:48,227 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:48,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:48,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1997687744, now seen corresponding path program 176 times [2021-06-12 19:58:48,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:48,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280255614] [2021-06-12 19:58:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:48,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280255614] [2021-06-12 19:58:48,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280255614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711615331] [2021-06-12 19:58:48,314 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 [2021-06-12 19:58:48,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:48,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:48,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,456 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 25 treesize of output 19 [2021-06-12 19:58:48,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,459 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 15 treesize of output 11 [2021-06-12 19:58:48,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,486 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. [2021-06-12 19:58:48,486 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-12 19:58:48,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,575 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 [2021-06-12 19:58:48,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:48,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,579 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 [2021-06-12 19:58:48,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,636 INFO L628 ElimStorePlain]: treesize reduction 74, result has 51.6 percent of original size [2021-06-12 19:58:48,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:48,639 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 21 treesize of output 7 [2021-06-12 19:58:48,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,642 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 [2021-06-12 19:58:48,643 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:48,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:48,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:48,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1434 vanished before elimination [2021-06-12 19:58:48,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:48,697 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-12 19:58:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:48,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711615331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:48,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:48,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:58:48,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775114451] [2021-06-12 19:58:48,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:58:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:58:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:58:48,754 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) [2021-06-12 19:58:49,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:49,231 INFO L93 Difference]: Finished difference Result 549 states and 1677 transitions. [2021-06-12 19:58:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:58:49,231 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 [2021-06-12 19:58:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:49,232 INFO L225 Difference]: With dead ends: 549 [2021-06-12 19:58:49,232 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 19:58:49,232 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:49,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 19:58:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 373. [2021-06-12 19:58:49,236 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) [2021-06-12 19:58:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1179 transitions. [2021-06-12 19:58:49,236 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1179 transitions. Word has length 18 [2021-06-12 19:58:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:49,236 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 1179 transitions. [2021-06-12 19:58:49,237 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) [2021-06-12 19:58:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1179 transitions. [2021-06-12 19:58:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:49,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:49,237 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:49,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5551 [2021-06-12 19:58:49,437 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:49,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1271693822, now seen corresponding path program 177 times [2021-06-12 19:58:49,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:49,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7396092] [2021-06-12 19:58:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7396092] [2021-06-12 19:58:49,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7396092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536289375] [2021-06-12 19:58:49,638 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 [2021-06-12 19:58:49,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:58:49,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:49,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:49,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,764 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 15 treesize of output 11 [2021-06-12 19:58:49,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,767 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 [2021-06-12 19:58:49,768 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,771 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 25 treesize of output 19 [2021-06-12 19:58:49,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,774 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 16 treesize of output 12 [2021-06-12 19:58:49,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,837 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-12 19:58:49,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:49,838 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-12 19:58:50,106 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1440, array_4], 1=[v_prenex_1439, array_0]} [2021-06-12 19:58:50,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:50,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:50,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,142 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-06-12 19:58:50,143 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 [2021-06-12 19:58:50,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:50,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,159 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1439 vanished before elimination [2021-06-12 19:58:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:50,161 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 11 treesize of output 3 [2021-06-12 19:58:50,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:50,164 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 [2021-06-12 19:58:50,164 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:50,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:50,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:50,184 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 19:58:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:50,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536289375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:50,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:50,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:50,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009673748] [2021-06-12 19:58:50,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:50,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:50,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:50,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:50,207 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) [2021-06-12 19:58:50,568 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-12 19:58:50,795 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-12 19:58:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:51,796 INFO L93 Difference]: Finished difference Result 681 states and 1992 transitions. [2021-06-12 19:58:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:58:51,796 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 [2021-06-12 19:58:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:51,797 INFO L225 Difference]: With dead ends: 681 [2021-06-12 19:58:51,797 INFO L226 Difference]: Without dead ends: 669 [2021-06-12 19:58:51,797 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1464.3ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:58:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-06-12 19:58:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 380. [2021-06-12 19:58:51,804 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) [2021-06-12 19:58:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1207 transitions. [2021-06-12 19:58:51,805 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1207 transitions. Word has length 18 [2021-06-12 19:58:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:51,805 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1207 transitions. [2021-06-12 19:58:51,805 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) [2021-06-12 19:58:51,805 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1207 transitions. [2021-06-12 19:58:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:51,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:51,805 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:52,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5564,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:52,020 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:52,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:52,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1074207120, now seen corresponding path program 178 times [2021-06-12 19:58:52,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:52,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052761032] [2021-06-12 19:58:52,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:52,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052761032] [2021-06-12 19:58:52,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052761032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392924766] [2021-06-12 19:58:52,233 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 [2021-06-12 19:58:52,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:52,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:52,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:52,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:52,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,341 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 [2021-06-12 19:58:52,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,345 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 26 treesize of output 20 [2021-06-12 19:58:52,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,348 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 25 treesize of output 19 [2021-06-12 19:58:52,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,352 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 16 treesize of output 12 [2021-06-12 19:58:52,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,416 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-12 19:58:52,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:52,417 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-12 19:58:52,707 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1446], 1=[array_0, v_prenex_1445]} [2021-06-12 19:58:52,709 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 27 treesize of output 21 [2021-06-12 19:58:52,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:52,712 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 25 treesize of output 19 [2021-06-12 19:58:52,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,753 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-12 19:58:52,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:52,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,773 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 11 treesize of output 3 [2021-06-12 19:58:52,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,775 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 21 treesize of output 7 [2021-06-12 19:58:52,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,795 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1445 vanished before elimination [2021-06-12 19:58:52,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:52,796 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 19:58:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392924766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:52,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:52,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655336608] [2021-06-12 19:58:52,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:52,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:52,824 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) [2021-06-12 19:58:53,299 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-06-12 19:58:53,640 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2021-06-12 19:58:53,812 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2021-06-12 19:58:54,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:54,366 INFO L93 Difference]: Finished difference Result 634 states and 1894 transitions. [2021-06-12 19:58:54,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:58:54,366 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 [2021-06-12 19:58:54,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:54,367 INFO L225 Difference]: With dead ends: 634 [2021-06-12 19:58:54,367 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 19:58:54,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1567.3ms TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:58:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 19:58:54,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 383. [2021-06-12 19:58:54,371 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) [2021-06-12 19:58:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1219 transitions. [2021-06-12 19:58:54,372 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1219 transitions. Word has length 18 [2021-06-12 19:58:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:54,372 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1219 transitions. [2021-06-12 19:58:54,372 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) [2021-06-12 19:58:54,372 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1219 transitions. [2021-06-12 19:58:54,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:54,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:54,372 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:54,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5579,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:54,573 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash -534377150, now seen corresponding path program 179 times [2021-06-12 19:58:54,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:54,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857145513] [2021-06-12 19:58:54,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:54,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857145513] [2021-06-12 19:58:54,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857145513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954687716] [2021-06-12 19:58:54,704 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 [2021-06-12 19:58:54,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:54,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:58:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:54,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,804 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 25 treesize of output 19 [2021-06-12 19:58:54,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,808 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 34 treesize of output 26 [2021-06-12 19:58:54,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,812 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 25 treesize of output 19 [2021-06-12 19:58:54,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,816 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 24 treesize of output 18 [2021-06-12 19:58:54,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,819 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 [2021-06-12 19:58:54,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:58:54,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:54,824 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 [2021-06-12 19:58:54,824 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:54,926 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:58:54,927 INFO L628 ElimStorePlain]: treesize reduction 59, result has 77.0 percent of original size [2021-06-12 19:58:54,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:54,928 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-06-12 19:58:55,399 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-12 19:58:55,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,404 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 [2021-06-12 19:58:55,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,410 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 25 treesize of output 19 [2021-06-12 19:58:55,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,415 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 27 treesize of output 21 [2021-06-12 19:58:55,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,420 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 [2021-06-12 19:58:55,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,425 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 28 treesize of output 22 [2021-06-12 19:58:55,426 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:55,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,431 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 [2021-06-12 19:58:55,431 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,436 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 [2021-06-12 19:58:55,437 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,441 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 [2021-06-12 19:58:55,442 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,446 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 26 treesize of output 20 [2021-06-12 19:58:55,447 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,452 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 [2021-06-12 19:58:55,453 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,464 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 28 treesize of output 22 [2021-06-12 19:58:55,466 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,471 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 16 treesize of output 12 [2021-06-12 19:58:55,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,477 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 [2021-06-12 19:58:55,477 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,481 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 27 treesize of output 21 [2021-06-12 19:58:55,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,625 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-12 19:58:55,625 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 19:58:55,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,630 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 20 treesize of output 9 [2021-06-12 19:58:55,630 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,634 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 20 treesize of output 9 [2021-06-12 19:58:55,634 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:55,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:58:55,695 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 19:58:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954687716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:55,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:55,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053320681] [2021-06-12 19:58:55,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:55,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:55,778 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) [2021-06-12 19:58:56,123 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-12 19:58:56,379 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2021-06-12 19:58:56,739 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 119 [2021-06-12 19:58:57,056 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 114 [2021-06-12 19:58:57,350 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2021-06-12 19:58:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:57,408 INFO L93 Difference]: Finished difference Result 597 states and 1799 transitions. [2021-06-12 19:58:57,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:58:57,409 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 [2021-06-12 19:58:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:57,409 INFO L225 Difference]: With dead ends: 597 [2021-06-12 19:58:57,409 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 19:58:57,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1773.1ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:58:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 19:58:57,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 385. [2021-06-12 19:58:57,413 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) [2021-06-12 19:58:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1224 transitions. [2021-06-12 19:58:57,414 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1224 transitions. Word has length 18 [2021-06-12 19:58:57,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:57,414 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1224 transitions. [2021-06-12 19:58:57,414 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) [2021-06-12 19:58:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1224 transitions. [2021-06-12 19:58:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:57,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:57,415 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:57,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5594 [2021-06-12 19:58:57,615 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1739522306, now seen corresponding path program 180 times [2021-06-12 19:58:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:57,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246067433] [2021-06-12 19:58:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:57,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246067433] [2021-06-12 19:58:57,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246067433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656186131] [2021-06-12 19:58:57,836 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 [2021-06-12 19:58:57,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:57,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:58:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:57,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,944 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 15 treesize of output 11 [2021-06-12 19:58:57,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,947 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 26 treesize of output 20 [2021-06-12 19:58:57,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,951 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 25 treesize of output 19 [2021-06-12 19:58:57,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,954 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 16 treesize of output 12 [2021-06-12 19:58:57,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,017 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-12 19:58:58,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:58,018 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-12 19:58:58,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,298 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 27 treesize of output 21 [2021-06-12 19:58:58,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:58:58,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,302 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 25 treesize of output 19 [2021-06-12 19:58:58,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,371 INFO L628 ElimStorePlain]: treesize reduction 101, result has 48.5 percent of original size [2021-06-12 19:58:58,374 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 7 treesize of output 5 [2021-06-12 19:58:58,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:58:58,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,428 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1461 vanished before elimination [2021-06-12 19:58:58,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:58,431 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 11 treesize of output 3 [2021-06-12 19:58:58,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,433 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 21 treesize of output 7 [2021-06-12 19:58:58,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:58,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:58,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1463 vanished before elimination [2021-06-12 19:58:58,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:58:58,465 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:58:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656186131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:58,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:58:58,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975171142] [2021-06-12 19:58:58,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:58:58,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:58:58,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:58:58,526 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) [2021-06-12 19:58:58,868 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-06-12 19:58:59,093 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-06-12 19:58:59,266 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-12 19:58:59,514 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2021-06-12 19:58:59,743 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-06-12 19:58:59,949 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-12 19:59:00,246 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-12 19:59:00,501 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2021-06-12 19:59:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:00,891 INFO L93 Difference]: Finished difference Result 647 states and 1923 transitions. [2021-06-12 19:59:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:59:00,891 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 [2021-06-12 19:59:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:00,892 INFO L225 Difference]: With dead ends: 647 [2021-06-12 19:59:00,892 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 19:59:00,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2347.1ms TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:59:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 19:59:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 381. [2021-06-12 19:59:00,897 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) [2021-06-12 19:59:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1220 transitions. [2021-06-12 19:59:00,897 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1220 transitions. Word has length 18 [2021-06-12 19:59:00,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:00,897 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1220 transitions. [2021-06-12 19:59:00,897 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) [2021-06-12 19:59:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1220 transitions. [2021-06-12 19:59:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:00,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:00,898 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:01,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5624 [2021-06-12 19:59:01,098 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:01,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:01,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1275381276, now seen corresponding path program 181 times [2021-06-12 19:59:01,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:01,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686444948] [2021-06-12 19:59:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:01,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:01,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686444948] [2021-06-12 19:59:01,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686444948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116718391] [2021-06-12 19:59:01,251 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 [2021-06-12 19:59:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:01,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,337 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 [2021-06-12 19:59:01,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,341 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 16 treesize of output 12 [2021-06-12 19:59:01,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,344 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 [2021-06-12 19:59:01,345 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,348 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 25 treesize of output 19 [2021-06-12 19:59:01,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,351 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 15 treesize of output 11 [2021-06-12 19:59:01,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,354 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 24 treesize of output 18 [2021-06-12 19:59:01,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,419 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 19:59:01,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:01,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 19:59:01,669 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1468], 1=[array_0, v_prenex_1467]} [2021-06-12 19:59:01,672 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 [2021-06-12 19:59:01,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,675 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 15 treesize of output 11 [2021-06-12 19:59:01,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,705 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:59:01,707 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 27 treesize of output 21 [2021-06-12 19:59:01,708 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:01,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,723 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:59:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,726 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 21 treesize of output 7 [2021-06-12 19:59:01,726 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,728 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 [2021-06-12 19:59:01,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:01,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:01,750 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:59:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116718391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:01,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971926271] [2021-06-12 19:59:01,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:01,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:01,770 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) [2021-06-12 19:59:02,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:02,415 INFO L93 Difference]: Finished difference Result 616 states and 1849 transitions. [2021-06-12 19:59:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:02,415 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 [2021-06-12 19:59:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:02,416 INFO L225 Difference]: With dead ends: 616 [2021-06-12 19:59:02,416 INFO L226 Difference]: Without dead ends: 611 [2021-06-12 19:59:02,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 750.3ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-12 19:59:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 386. [2021-06-12 19:59:02,420 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) [2021-06-12 19:59:02,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1240 transitions. [2021-06-12 19:59:02,421 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1240 transitions. Word has length 18 [2021-06-12 19:59:02,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:02,421 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1240 transitions. [2021-06-12 19:59:02,421 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) [2021-06-12 19:59:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1240 transitions. [2021-06-12 19:59:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:02,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:02,421 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:02,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5641 [2021-06-12 19:59:02,622 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2131877222, now seen corresponding path program 182 times [2021-06-12 19:59:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2747958] [2021-06-12 19:59:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:02,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2747958] [2021-06-12 19:59:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2747958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303188219] [2021-06-12 19:59:02,771 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 [2021-06-12 19:59:02,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:02,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:02,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:02,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,855 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 25 treesize of output 19 [2021-06-12 19:59:02,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,858 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 16 treesize of output 12 [2021-06-12 19:59:02,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,861 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 26 treesize of output 20 [2021-06-12 19:59:02,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,865 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 [2021-06-12 19:59:02,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,868 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 15 treesize of output 11 [2021-06-12 19:59:02,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:02,871 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 24 treesize of output 18 [2021-06-12 19:59:02,872 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:02,935 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 19:59:02,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:02,936 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 19:59:03,180 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1473, array_4], 1=[array_0, v_prenex_1472]} [2021-06-12 19:59:03,183 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 27 treesize of output 21 [2021-06-12 19:59:03,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:03,186 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 [2021-06-12 19:59:03,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,225 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 19:59:03,227 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 7 treesize of output 5 [2021-06-12 19:59:03,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,243 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:59:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,245 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 21 treesize of output 7 [2021-06-12 19:59:03,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:03,248 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 11 treesize of output 3 [2021-06-12 19:59:03,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:03,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:03,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:03,269 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:59:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303188219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:03,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:03,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668457593] [2021-06-12 19:59:03,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:03,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:03,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:03,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:03,290 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) [2021-06-12 19:59:03,761 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 19:59:03,950 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2021-06-12 19:59:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:04,080 INFO L93 Difference]: Finished difference Result 612 states and 1850 transitions. [2021-06-12 19:59:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:04,080 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 [2021-06-12 19:59:04,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:04,081 INFO L225 Difference]: With dead ends: 612 [2021-06-12 19:59:04,081 INFO L226 Difference]: Without dead ends: 607 [2021-06-12 19:59:04,081 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 859.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-12 19:59:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 389. [2021-06-12 19:59:04,085 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) [2021-06-12 19:59:04,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1252 transitions. [2021-06-12 19:59:04,086 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1252 transitions. Word has length 18 [2021-06-12 19:59:04,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:04,086 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1252 transitions. [2021-06-12 19:59:04,086 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) [2021-06-12 19:59:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1252 transitions. [2021-06-12 19:59:04,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:04,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:04,086 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:04,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:04,287 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:04,287 INFO L82 PathProgramCache]: Analyzing trace with hash 191888476, now seen corresponding path program 183 times [2021-06-12 19:59:04,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:04,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949103536] [2021-06-12 19:59:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:04,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949103536] [2021-06-12 19:59:04,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949103536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527721233] [2021-06-12 19:59:04,424 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 [2021-06-12 19:59:04,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:04,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:04,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,521 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 15 treesize of output 11 [2021-06-12 19:59:04,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,524 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 16 treesize of output 12 [2021-06-12 19:59:04,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,527 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 18 treesize of output 14 [2021-06-12 19:59:04,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,530 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 17 treesize of output 13 [2021-06-12 19:59:04,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,557 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-12 19:59:04,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:04,558 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-12 19:59:04,717 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-06-12 19:59:04,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,720 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 [2021-06-12 19:59:04,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,724 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 [2021-06-12 19:59:04,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,728 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 17 treesize of output 13 [2021-06-12 19:59:04,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,731 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 [2021-06-12 19:59:04,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:04,804 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 19:59:04,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,808 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 9 treesize of output 3 [2021-06-12 19:59:04,808 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,811 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 [2021-06-12 19:59:04,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,814 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 [2021-06-12 19:59:04,815 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:04,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:04,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:04,854 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-12 19:59:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527721233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:04,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:04,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545867316] [2021-06-12 19:59:04,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:04,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:04,932 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) [2021-06-12 19:59:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:05,721 INFO L93 Difference]: Finished difference Result 622 states and 1886 transitions. [2021-06-12 19:59:05,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:05,721 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 [2021-06-12 19:59:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:05,722 INFO L225 Difference]: With dead ends: 622 [2021-06-12 19:59:05,722 INFO L226 Difference]: Without dead ends: 617 [2021-06-12 19:59:05,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 798.6ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:59:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-06-12 19:59:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 383. [2021-06-12 19:59:05,726 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) [2021-06-12 19:59:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1224 transitions. [2021-06-12 19:59:05,727 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1224 transitions. Word has length 18 [2021-06-12 19:59:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:05,727 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1224 transitions. [2021-06-12 19:59:05,727 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) [2021-06-12 19:59:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1224 transitions. [2021-06-12 19:59:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:05,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:05,727 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:05,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5676,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:05,928 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2058487706, now seen corresponding path program 184 times [2021-06-12 19:59:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:05,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308242028] [2021-06-12 19:59:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:06,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308242028] [2021-06-12 19:59:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308242028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650225946] [2021-06-12 19:59:06,175 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 [2021-06-12 19:59:06,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:06,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,260 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 [2021-06-12 19:59:06,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,263 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 16 treesize of output 12 [2021-06-12 19:59:06,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,267 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 26 treesize of output 20 [2021-06-12 19:59:06,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,270 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 25 treesize of output 19 [2021-06-12 19:59:06,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,274 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 15 treesize of output 11 [2021-06-12 19:59:06,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,277 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 24 treesize of output 18 [2021-06-12 19:59:06,277 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,337 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 19:59:06,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:06,338 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 19:59:06,565 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1479], 1=[array_0, v_prenex_1478]} [2021-06-12 19:59:06,568 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 [2021-06-12 19:59:06,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,572 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 [2021-06-12 19:59:06,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,611 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:59:06,613 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 27 treesize of output 21 [2021-06-12 19:59:06,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:06,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,634 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:59:06,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,636 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 11 treesize of output 3 [2021-06-12 19:59:06,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:06,639 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 21 treesize of output 7 [2021-06-12 19:59:06,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:06,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:06,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:06,659 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:59:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:06,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650225946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:06,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:06,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136384045] [2021-06-12 19:59:06,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:06,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:06,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:06,682 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) [2021-06-12 19:59:07,082 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-12 19:59:07,350 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2021-06-12 19:59:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:07,490 INFO L93 Difference]: Finished difference Result 565 states and 1725 transitions. [2021-06-12 19:59:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:07,490 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 [2021-06-12 19:59:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:07,491 INFO L225 Difference]: With dead ends: 565 [2021-06-12 19:59:07,491 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 19:59:07,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 988.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:07,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 19:59:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 384. [2021-06-12 19:59:07,495 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) [2021-06-12 19:59:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1226 transitions. [2021-06-12 19:59:07,496 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1226 transitions. Word has length 18 [2021-06-12 19:59:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:07,496 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1226 transitions. [2021-06-12 19:59:07,496 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) [2021-06-12 19:59:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1226 transitions. [2021-06-12 19:59:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:07,496 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:07,496 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:07,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5691 [2021-06-12 19:59:07,697 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2131860186, now seen corresponding path program 185 times [2021-06-12 19:59:07,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:07,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182628512] [2021-06-12 19:59:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:07,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:07,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182628512] [2021-06-12 19:59:07,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182628512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:07,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868429814] [2021-06-12 19:59:07,854 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 [2021-06-12 19:59:07,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:07,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:07,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:07,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,945 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 15 treesize of output 11 [2021-06-12 19:59:07,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,948 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 16 treesize of output 12 [2021-06-12 19:59:07,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,951 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 18 treesize of output 14 [2021-06-12 19:59:07,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,954 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 17 treesize of output 13 [2021-06-12 19:59:07,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,982 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-12 19:59:07,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:07,983 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-12 19:59:08,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:59:08,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,056 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 [2021-06-12 19:59:08,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,060 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 15 treesize of output 11 [2021-06-12 19:59:08,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:08,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,066 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 18 treesize of output 14 [2021-06-12 19:59:08,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,069 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 [2021-06-12 19:59:08,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:08,125 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-12 19:59:08,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,128 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 21 treesize of output 7 [2021-06-12 19:59:08,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,130 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 11 treesize of output 3 [2021-06-12 19:59:08,131 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:08,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:08,162 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-12 19:59:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868429814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:08,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:08,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813745423] [2021-06-12 19:59:08,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:08,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:08,267 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) [2021-06-12 19:59:09,053 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-12 19:59:09,212 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-12 19:59:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:09,403 INFO L93 Difference]: Finished difference Result 604 states and 1814 transitions. [2021-06-12 19:59:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:59:09,403 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 [2021-06-12 19:59:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:09,404 INFO L225 Difference]: With dead ends: 604 [2021-06-12 19:59:09,404 INFO L226 Difference]: Without dead ends: 593 [2021-06-12 19:59:09,404 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1095.3ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:59:09,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-06-12 19:59:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 383. [2021-06-12 19:59:09,408 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) [2021-06-12 19:59:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1227 transitions. [2021-06-12 19:59:09,409 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1227 transitions. Word has length 18 [2021-06-12 19:59:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1227 transitions. [2021-06-12 19:59:09,409 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) [2021-06-12 19:59:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1227 transitions. [2021-06-12 19:59:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:09,409 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:09,409 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:09,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5709,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:09,610 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1560198562, now seen corresponding path program 186 times [2021-06-12 19:59:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989897352] [2021-06-12 19:59:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:09,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989897352] [2021-06-12 19:59:09,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989897352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727884529] [2021-06-12 19:59:09,750 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 [2021-06-12 19:59:09,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:59:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:09,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:09,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:09,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,857 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 25 treesize of output 19 [2021-06-12 19:59:09,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,860 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 34 treesize of output 26 [2021-06-12 19:59:09,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,864 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 [2021-06-12 19:59:09,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,868 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 18 [2021-06-12 19:59:09,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,872 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 35 treesize of output 27 [2021-06-12 19:59:09,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:59:09,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:09,876 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 [2021-06-12 19:59:09,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:09,978 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:59:09,979 INFO L628 ElimStorePlain]: treesize reduction 59, result has 77.0 percent of original size [2021-06-12 19:59:09,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:09,980 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-06-12 19:59:10,523 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-12 19:59:10,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,528 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 [2021-06-12 19:59:10,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,534 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 [2021-06-12 19:59:10,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,539 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 [2021-06-12 19:59:10,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,544 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 26 treesize of output 20 [2021-06-12 19:59:10,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,550 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 28 treesize of output 22 [2021-06-12 19:59:10,551 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:10,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,556 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 [2021-06-12 19:59:10,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,561 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 26 treesize of output 20 [2021-06-12 19:59:10,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,566 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 28 treesize of output 22 [2021-06-12 19:59:10,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,572 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 27 treesize of output 21 [2021-06-12 19:59:10,573 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,577 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 28 treesize of output 22 [2021-06-12 19:59:10,578 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,583 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 16 treesize of output 12 [2021-06-12 19:59:10,583 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,588 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 [2021-06-12 19:59:10,589 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,593 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 27 treesize of output 21 [2021-06-12 19:59:10,594 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,598 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 [2021-06-12 19:59:10,599 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,747 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-12 19:59:10,747 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 19:59:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,752 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 20 treesize of output 9 [2021-06-12 19:59:10,752 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,756 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 20 treesize of output 9 [2021-06-12 19:59:10,757 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:10,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:59:10,812 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 19:59:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727884529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:10,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942028910] [2021-06-12 19:59:10,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:10,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:10,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:10,896 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) [2021-06-12 19:59:11,216 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-12 19:59:11,407 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-06-12 19:59:11,697 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 104 [2021-06-12 19:59:11,938 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-06-12 19:59:12,149 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-06-12 19:59:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:12,193 INFO L93 Difference]: Finished difference Result 570 states and 1742 transitions. [2021-06-12 19:59:12,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:12,193 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 [2021-06-12 19:59:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:12,194 INFO L225 Difference]: With dead ends: 570 [2021-06-12 19:59:12,194 INFO L226 Difference]: Without dead ends: 557 [2021-06-12 19:59:12,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1586.0ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-06-12 19:59:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 383. [2021-06-12 19:59:12,198 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) [2021-06-12 19:59:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1226 transitions. [2021-06-12 19:59:12,198 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1226 transitions. Word has length 18 [2021-06-12 19:59:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:12,198 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1226 transitions. [2021-06-12 19:59:12,198 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) [2021-06-12 19:59:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1226 transitions. [2021-06-12 19:59:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:12,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:12,199 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:12,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5722,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:12,411 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1377475410, now seen corresponding path program 187 times [2021-06-12 19:59:12,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:12,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54166272] [2021-06-12 19:59:12,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:12,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:12,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54166272] [2021-06-12 19:59:12,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54166272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400666739] [2021-06-12 19:59:12,630 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 [2021-06-12 19:59:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,713 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 [2021-06-12 19:59:12,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,716 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 16 treesize of output 12 [2021-06-12 19:59:12,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,720 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 [2021-06-12 19:59:12,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,723 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 25 treesize of output 19 [2021-06-12 19:59:12,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,727 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 [2021-06-12 19:59:12,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,730 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 24 treesize of output 18 [2021-06-12 19:59:12,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,790 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 19:59:12,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:12,791 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 19:59:13,050 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1499], 1=[array_0, v_prenex_1498]} [2021-06-12 19:59:13,052 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 27 treesize of output 21 [2021-06-12 19:59:13,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:13,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:13,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,095 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 19:59:13,097 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 [2021-06-12 19:59:13,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,119 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 11 treesize of output 3 [2021-06-12 19:59:13,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:13,122 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 21 treesize of output 7 [2021-06-12 19:59:13,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:13,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:13,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1498 vanished before elimination [2021-06-12 19:59:13,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:13,142 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:59:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400666739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:13,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:13,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299241160] [2021-06-12 19:59:13,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:13,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:13,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:13,163 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) [2021-06-12 19:59:13,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:13,777 INFO L93 Difference]: Finished difference Result 573 states and 1745 transitions. [2021-06-12 19:59:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:13,778 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 [2021-06-12 19:59:13,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:13,779 INFO L225 Difference]: With dead ends: 573 [2021-06-12 19:59:13,779 INFO L226 Difference]: Without dead ends: 568 [2021-06-12 19:59:13,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-12 19:59:13,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 386. [2021-06-12 19:59:13,783 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) [2021-06-12 19:59:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1238 transitions. [2021-06-12 19:59:13,784 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1238 transitions. Word has length 18 [2021-06-12 19:59:13,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:13,784 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1238 transitions. [2021-06-12 19:59:13,784 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) [2021-06-12 19:59:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1238 transitions. [2021-06-12 19:59:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:13,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:13,784 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:13,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5752,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:13,985 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:13,985 INFO L82 PathProgramCache]: Analyzing trace with hash -562513336, now seen corresponding path program 188 times [2021-06-12 19:59:13,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:13,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558225378] [2021-06-12 19:59:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:14,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558225378] [2021-06-12 19:59:14,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558225378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451762228] [2021-06-12 19:59:14,147 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 [2021-06-12 19:59:14,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:14,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:14,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,226 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 15 treesize of output 11 [2021-06-12 19:59:14,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,229 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 16 treesize of output 12 [2021-06-12 19:59:14,230 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,232 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 18 treesize of output 14 [2021-06-12 19:59:14,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,235 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 17 treesize of output 13 [2021-06-12 19:59:14,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,263 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-12 19:59:14,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:14,263 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-12 19:59:14,430 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_0]} [2021-06-12 19:59:14,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,434 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 [2021-06-12 19:59:14,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,437 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 15 treesize of output 11 [2021-06-12 19:59:14,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,441 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 25 treesize of output 19 [2021-06-12 19:59:14,441 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,444 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 27 treesize of output 21 [2021-06-12 19:59:14,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:14,519 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 19:59:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,522 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 11 treesize of output 3 [2021-06-12 19:59:14,523 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,526 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 21 treesize of output 7 [2021-06-12 19:59:14,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,535 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 9 treesize of output 3 [2021-06-12 19:59:14,536 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:14,568 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-12 19:59:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451762228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:14,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:14,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650424694] [2021-06-12 19:59:14,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:14,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:14,650 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) [2021-06-12 19:59:15,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:15,075 INFO L93 Difference]: Finished difference Result 579 states and 1769 transitions. [2021-06-12 19:59:15,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:15,076 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 [2021-06-12 19:59:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:15,076 INFO L225 Difference]: With dead ends: 579 [2021-06-12 19:59:15,076 INFO L226 Difference]: Without dead ends: 574 [2021-06-12 19:59:15,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-12 19:59:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 383. [2021-06-12 19:59:15,081 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) [2021-06-12 19:59:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1226 transitions. [2021-06-12 19:59:15,081 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1226 transitions. Word has length 18 [2021-06-12 19:59:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:15,081 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1226 transitions. [2021-06-12 19:59:15,081 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) [2021-06-12 19:59:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1226 transitions. [2021-06-12 19:59:15,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:15,082 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:15,082 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:15,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5769 [2021-06-12 19:59:15,282 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:15,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1618750450, now seen corresponding path program 189 times [2021-06-12 19:59:15,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:15,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674046905] [2021-06-12 19:59:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:15,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:15,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674046905] [2021-06-12 19:59:15,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674046905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:15,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031985345] [2021-06-12 19:59:15,443 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 [2021-06-12 19:59:15,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:15,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:15,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:15,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,547 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 25 treesize of output 19 [2021-06-12 19:59:15,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,551 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 34 treesize of output 26 [2021-06-12 19:59:15,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,555 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 25 treesize of output 19 [2021-06-12 19:59:15,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,559 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 24 treesize of output 18 [2021-06-12 19:59:15,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,562 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 35 treesize of output 27 [2021-06-12 19:59:15,564 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:59:15,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,580 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 [2021-06-12 19:59:15,581 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,692 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:59:15,692 INFO L628 ElimStorePlain]: treesize reduction 53, result has 78.8 percent of original size [2021-06-12 19:59:15,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:15,694 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:220, output treesize:197 [2021-06-12 19:59:15,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,868 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 46 treesize of output 36 [2021-06-12 19:59:15,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,873 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 [2021-06-12 19:59:15,873 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,877 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 45 treesize of output 35 [2021-06-12 19:59:15,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:15,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,886 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 15 treesize of output 11 [2021-06-12 19:59:15,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,890 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 [2021-06-12 19:59:15,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:15,894 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,898 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 16 treesize of output 12 [2021-06-12 19:59:15,898 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:15,902 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:15,905 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,908 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 27 treesize of output 21 [2021-06-12 19:59:15,909 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,913 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 25 treesize of output 19 [2021-06-12 19:59:15,913 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,917 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 [2021-06-12 19:59:15,917 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,921 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 [2021-06-12 19:59:15,921 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:15,996 INFO L628 ElimStorePlain]: treesize reduction 213, result has 29.5 percent of original size [2021-06-12 19:59:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:15,999 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 [2021-06-12 19:59:16,000 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,002 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 20 treesize of output 9 [2021-06-12 19:59:16,002 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:16,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:16,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:16,033 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:599, output treesize:67 [2021-06-12 19:59:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:16,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031985345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:16,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:16,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:16,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362527630] [2021-06-12 19:59:16,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:16,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:16,144 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) [2021-06-12 19:59:16,460 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-12 19:59:16,647 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2021-06-12 19:59:16,859 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-06-12 19:59:17,071 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-06-12 19:59:17,293 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2021-06-12 19:59:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:17,329 INFO L93 Difference]: Finished difference Result 570 states and 1737 transitions. [2021-06-12 19:59:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:17,329 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 [2021-06-12 19:59:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:17,330 INFO L225 Difference]: With dead ends: 570 [2021-06-12 19:59:17,330 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 19:59:17,330 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1288.6ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 19:59:17,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 384. [2021-06-12 19:59:17,334 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) [2021-06-12 19:59:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1225 transitions. [2021-06-12 19:59:17,334 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1225 transitions. Word has length 18 [2021-06-12 19:59:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:17,334 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1225 transitions. [2021-06-12 19:59:17,335 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) [2021-06-12 19:59:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1225 transitions. [2021-06-12 19:59:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:17,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:17,335 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:17,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-12 19:59:17,535 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1865370622, now seen corresponding path program 190 times [2021-06-12 19:59:17,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:17,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927883311] [2021-06-12 19:59:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:17,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927883311] [2021-06-12 19:59:17,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927883311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674039826] [2021-06-12 19:59:17,705 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 [2021-06-12 19:59:17,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:17,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:17,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:17,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:17,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,823 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 25 treesize of output 19 [2021-06-12 19:59:17,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,827 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 17 treesize of output 13 [2021-06-12 19:59:17,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,831 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 [2021-06-12 19:59:17,832 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,835 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 [2021-06-12 19:59:17,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:17,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:17,877 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. [2021-06-12 19:59:17,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:137, output treesize:125 [2021-06-12 19:59:18,193 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_0]} [2021-06-12 19:59:18,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,198 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 [2021-06-12 19:59:18,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,202 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 28 treesize of output 22 [2021-06-12 19:59:18,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,207 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 27 treesize of output 21 [2021-06-12 19:59:18,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,212 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 [2021-06-12 19:59:18,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,217 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 26 treesize of output 20 [2021-06-12 19:59:18,218 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,221 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 16 treesize of output 12 [2021-06-12 19:59:18,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,226 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 15 treesize of output 11 [2021-06-12 19:59:18,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,231 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 19 treesize of output 15 [2021-06-12 19:59:18,231 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,236 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 [2021-06-12 19:59:18,237 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,240 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 16 treesize of output 12 [2021-06-12 19:59:18,241 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,245 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 17 treesize of output 13 [2021-06-12 19:59:18,246 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,249 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 [2021-06-12 19:59:18,250 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,393 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-12 19:59:18,393 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.3 percent of original size [2021-06-12 19:59:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,397 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 10 treesize of output 5 [2021-06-12 19:59:18,398 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,402 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 9 treesize of output 3 [2021-06-12 19:59:18,402 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:18,405 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 20 treesize of output 9 [2021-06-12 19:59:18,406 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:18,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:18,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:59:18,466 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:395, output treesize:76 [2021-06-12 19:59:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:18,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674039826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:18,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570646181] [2021-06-12 19:59:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:18,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:18,554 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) [2021-06-12 19:59:18,832 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-12 19:59:19,049 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-06-12 19:59:19,332 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 103 [2021-06-12 19:59:19,486 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2021-06-12 19:59:19,697 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-06-12 19:59:19,875 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-12 19:59:20,031 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-06-12 19:59:20,174 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2021-06-12 19:59:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:20,287 INFO L93 Difference]: Finished difference Result 586 states and 1775 transitions. [2021-06-12 19:59:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:20,288 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 [2021-06-12 19:59:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:20,289 INFO L225 Difference]: With dead ends: 586 [2021-06-12 19:59:20,289 INFO L226 Difference]: Without dead ends: 572 [2021-06-12 19:59:20,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1737.4ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:59:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-12 19:59:20,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 382. [2021-06-12 19:59:20,293 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) [2021-06-12 19:59:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1221 transitions. [2021-06-12 19:59:20,293 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1221 transitions. Word has length 18 [2021-06-12 19:59:20,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:20,293 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1221 transitions. [2021-06-12 19:59:20,293 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) [2021-06-12 19:59:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1221 transitions. [2021-06-12 19:59:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:20,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:20,294 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:20,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5805 [2021-06-12 19:59:20,494 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1627349486, now seen corresponding path program 191 times [2021-06-12 19:59:20,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:20,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023575934] [2021-06-12 19:59:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:20,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:20,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023575934] [2021-06-12 19:59:20,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023575934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546801161] [2021-06-12 19:59:20,737 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 [2021-06-12 19:59:20,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:20,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:20,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:20,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:20,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,848 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 [2021-06-12 19:59:20,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,851 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 16 treesize of output 12 [2021-06-12 19:59:20,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,855 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 26 treesize of output 20 [2021-06-12 19:59:20,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,858 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 25 treesize of output 19 [2021-06-12 19:59:20,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,922 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 19:59:20,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:20,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-12 19:59:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,037 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 16 treesize of output 12 [2021-06-12 19:59:21,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,042 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 27 treesize of output 21 [2021-06-12 19:59:21,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,046 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 17 treesize of output 13 [2021-06-12 19:59:21,047 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:21,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,054 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 18 treesize of output 14 [2021-06-12 19:59:21,054 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,058 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 15 treesize of output 11 [2021-06-12 19:59:21,058 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,061 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 25 treesize of output 19 [2021-06-12 19:59:21,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,122 INFO L628 ElimStorePlain]: treesize reduction 114, result has 41.5 percent of original size [2021-06-12 19:59:21,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:21,125 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 11 treesize of output 3 [2021-06-12 19:59:21,126 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,128 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 21 treesize of output 7 [2021-06-12 19:59:21,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:21,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:21,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:21,161 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:250, output treesize:59 [2021-06-12 19:59:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546801161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:21,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:21,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89731218] [2021-06-12 19:59:21,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:21,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:21,309 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) [2021-06-12 19:59:21,854 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-06-12 19:59:22,111 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2021-06-12 19:59:22,384 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-06-12 19:59:22,640 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-06-12 19:59:23,005 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-06-12 19:59:23,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:23,157 INFO L93 Difference]: Finished difference Result 573 states and 1733 transitions. [2021-06-12 19:59:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:23,157 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 [2021-06-12 19:59:23,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:23,158 INFO L225 Difference]: With dead ends: 573 [2021-06-12 19:59:23,158 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 19:59:23,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1968.1ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 19:59:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 380. [2021-06-12 19:59:23,162 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) [2021-06-12 19:59:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1214 transitions. [2021-06-12 19:59:23,162 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1214 transitions. Word has length 18 [2021-06-12 19:59:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:23,162 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1214 transitions. [2021-06-12 19:59:23,162 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) [2021-06-12 19:59:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1214 transitions. [2021-06-12 19:59:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:23,163 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:23,163 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:23,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5829,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:23,363 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:23,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1710682082, now seen corresponding path program 192 times [2021-06-12 19:59:23,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:23,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694808724] [2021-06-12 19:59:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:23,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:23,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694808724] [2021-06-12 19:59:23,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694808724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352125643] [2021-06-12 19:59:23,578 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 [2021-06-12 19:59:23,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:23,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:23,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,661 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 [2021-06-12 19:59:23,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,664 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 16 treesize of output 12 [2021-06-12 19:59:23,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,667 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 18 treesize of output 14 [2021-06-12 19:59:23,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,670 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 17 treesize of output 13 [2021-06-12 19:59:23,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,698 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-12 19:59:23,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:23,699 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-12 19:59:23,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,771 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 17 treesize of output 13 [2021-06-12 19:59:23,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,775 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 [2021-06-12 19:59:23,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,779 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 15 treesize of output 11 [2021-06-12 19:59:23,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:23,783 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:23,786 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,789 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 [2021-06-12 19:59:23,790 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:23,844 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-12 19:59:23,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,846 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 21 treesize of output 7 [2021-06-12 19:59:23,847 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,849 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 11 treesize of output 3 [2021-06-12 19:59:23,849 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:23,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:23,880 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-12 19:59:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352125643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:23,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974400803] [2021-06-12 19:59:23,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:23,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:23,985 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) [2021-06-12 19:59:24,668 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-06-12 19:59:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:24,714 INFO L93 Difference]: Finished difference Result 590 states and 1797 transitions. [2021-06-12 19:59:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:24,715 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 [2021-06-12 19:59:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:24,716 INFO L225 Difference]: With dead ends: 590 [2021-06-12 19:59:24,716 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 19:59:24,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 851.9ms TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:59:24,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 19:59:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 379. [2021-06-12 19:59:24,720 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) [2021-06-12 19:59:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1211 transitions. [2021-06-12 19:59:24,720 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1211 transitions. Word has length 18 [2021-06-12 19:59:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:24,720 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1211 transitions. [2021-06-12 19:59:24,720 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) [2021-06-12 19:59:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1211 transitions. [2021-06-12 19:59:24,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:24,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:24,721 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:24,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5842,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:24,921 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:24,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:24,922 INFO L82 PathProgramCache]: Analyzing trace with hash 652314188, now seen corresponding path program 193 times [2021-06-12 19:59:24,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:24,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150308059] [2021-06-12 19:59:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150308059] [2021-06-12 19:59:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150308059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005886387] [2021-06-12 19:59:25,080 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 [2021-06-12 19:59:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,333 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 16 treesize of output 12 [2021-06-12 19:59:25,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,337 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 15 treesize of output 11 [2021-06-12 19:59:25,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,341 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 16 treesize of output 12 [2021-06-12 19:59:25,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,349 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 15 treesize of output 11 [2021-06-12 19:59:25,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,354 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 26 treesize of output 20 [2021-06-12 19:59:25,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,357 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 25 treesize of output 19 [2021-06-12 19:59:25,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,467 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:59:25,467 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:59:25,471 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. [2021-06-12 19:59:25,472 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:59:25,634 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1515, array_4], 1=[array_0, v_prenex_1514]} [2021-06-12 19:59:25,637 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 25 treesize of output 19 [2021-06-12 19:59:25,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,640 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 27 treesize of output 21 [2021-06-12 19:59:25,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:25,678 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-12 19:59:25,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:25,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,696 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:59:25,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,698 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 11 treesize of output 3 [2021-06-12 19:59:25,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,701 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 [2021-06-12 19:59:25,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:25,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:25,721 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 19:59:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005886387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:25,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:25,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790544721] [2021-06-12 19:59:25,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:25,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:25,744 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) [2021-06-12 19:59:26,435 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 19:59:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:27,047 INFO L93 Difference]: Finished difference Result 562 states and 1713 transitions. [2021-06-12 19:59:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:27,047 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 [2021-06-12 19:59:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:27,048 INFO L225 Difference]: With dead ends: 562 [2021-06-12 19:59:27,048 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 19:59:27,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1246.7ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 19:59:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 387. [2021-06-12 19:59:27,052 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) [2021-06-12 19:59:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1235 transitions. [2021-06-12 19:59:27,053 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1235 transitions. Word has length 18 [2021-06-12 19:59:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:27,053 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1235 transitions. [2021-06-12 19:59:27,053 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) [2021-06-12 19:59:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1235 transitions. [2021-06-12 19:59:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:27,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:27,053 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:27,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5854,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:27,254 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2133552058, now seen corresponding path program 194 times [2021-06-12 19:59:27,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:27,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734534593] [2021-06-12 19:59:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:27,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734534593] [2021-06-12 19:59:27,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734534593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280138767] [2021-06-12 19:59:27,520 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 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 [2021-06-12 19:59:27,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:27,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:27,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:27,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:27,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,771 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 16 treesize of output 12 [2021-06-12 19:59:27,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,775 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 26 treesize of output 20 [2021-06-12 19:59:27,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,779 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 15 treesize of output 11 [2021-06-12 19:59:27,780 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,783 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 [2021-06-12 19:59:27,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,787 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 16 treesize of output 12 [2021-06-12 19:59:27,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:27,792 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,899 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 19:59:27,899 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 19:59:27,903 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. [2021-06-12 19:59:27,903 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 19:59:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,028 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 17 treesize of output 13 [2021-06-12 19:59:28,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,032 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 15 treesize of output 11 [2021-06-12 19:59:28,033 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,098 INFO L628 ElimStorePlain]: treesize reduction 101, result has 43.3 percent of original size [2021-06-12 19:59:28,098 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:59:28,101 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 [2021-06-12 19:59:28,101 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:28,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,131 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 11 treesize of output 3 [2021-06-12 19:59:28,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:28,134 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 [2021-06-12 19:59:28,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,167 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 7 treesize of output 5 [2021-06-12 19:59:28,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:28,191 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1524 vanished before elimination [2021-06-12 19:59:28,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:28,192 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 19:59:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280138767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:28,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:28,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957040645] [2021-06-12 19:59:28,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:28,255 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) [2021-06-12 19:59:28,934 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 19:59:29,199 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 19:59:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:29,567 INFO L93 Difference]: Finished difference Result 573 states and 1735 transitions. [2021-06-12 19:59:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:29,567 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 [2021-06-12 19:59:29,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:29,568 INFO L225 Difference]: With dead ends: 573 [2021-06-12 19:59:29,568 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 19:59:29,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1390.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 19:59:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 388. [2021-06-12 19:59:29,572 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) [2021-06-12 19:59:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1245 transitions. [2021-06-12 19:59:29,573 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1245 transitions. Word has length 18 [2021-06-12 19:59:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1245 transitions. [2021-06-12 19:59:29,573 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) [2021-06-12 19:59:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1245 transitions. [2021-06-12 19:59:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:29,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:29,574 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:29,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5874,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:29,774 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 817394754, now seen corresponding path program 195 times [2021-06-12 19:59:29,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:29,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125586790] [2021-06-12 19:59:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125586790] [2021-06-12 19:59:29,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125586790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145212814] [2021-06-12 19:59:29,938 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 [2021-06-12 19:59:29,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:59:29,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:29,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,233 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 17 treesize of output 13 [2021-06-12 19:59:30,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,238 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 [2021-06-12 19:59:30,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,309 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 [2021-06-12 19:59:30,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,313 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 27 treesize of output 21 [2021-06-12 19:59:30,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:30,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,385 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 15 treesize of output 11 [2021-06-12 19:59:30,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,389 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 17 treesize of output 13 [2021-06-12 19:59:30,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,463 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. [2021-06-12 19:59:30,464 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:217, output treesize:193 [2021-06-12 19:59:30,652 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 19:59:30,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,657 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 28 treesize of output 22 [2021-06-12 19:59:30,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,662 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 29 treesize of output 23 [2021-06-12 19:59:30,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,668 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 [2021-06-12 19:59:30,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,672 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 [2021-06-12 19:59:30,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,678 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 17 treesize of output 13 [2021-06-12 19:59:30,678 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,683 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 19 treesize of output 15 [2021-06-12 19:59:30,683 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,688 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 [2021-06-12 19:59:30,688 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,692 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 16 treesize of output 12 [2021-06-12 19:59:30,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,697 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 25 treesize of output 19 [2021-06-12 19:59:30,698 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,703 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 [2021-06-12 19:59:30,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,707 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 18 treesize of output 14 [2021-06-12 19:59:30,708 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:30,712 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,875 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-12 19:59:30,875 INFO L628 ElimStorePlain]: treesize reduction 110, result has 62.7 percent of original size [2021-06-12 19:59:30,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,879 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 21 treesize of output 7 [2021-06-12 19:59:30,880 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,884 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 9 treesize of output 3 [2021-06-12 19:59:30,885 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:30,888 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 11 treesize of output 3 [2021-06-12 19:59:30,889 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:30,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:30,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 19:59:30,954 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:459, output treesize:85 [2021-06-12 19:59:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:31,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145212814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:31,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:31,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787558682] [2021-06-12 19:59:31,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:31,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:31,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:31,055 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) [2021-06-12 19:59:31,568 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-06-12 19:59:31,776 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 94 [2021-06-12 19:59:31,908 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-12 19:59:32,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:32,041 INFO L93 Difference]: Finished difference Result 557 states and 1718 transitions. [2021-06-12 19:59:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:32,041 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 [2021-06-12 19:59:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:32,042 INFO L225 Difference]: With dead ends: 557 [2021-06-12 19:59:32,042 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 19:59:32,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1192.9ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 19:59:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 386. [2021-06-12 19:59:32,046 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) [2021-06-12 19:59:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1240 transitions. [2021-06-12 19:59:32,046 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1240 transitions. Word has length 18 [2021-06-12 19:59:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:32,047 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1240 transitions. [2021-06-12 19:59:32,047 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) [2021-06-12 19:59:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1240 transitions. [2021-06-12 19:59:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:32,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:32,047 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:32,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5896,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:32,248 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:32,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1095578010, now seen corresponding path program 196 times [2021-06-12 19:59:32,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:32,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587225347] [2021-06-12 19:59:32,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:32,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587225347] [2021-06-12 19:59:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587225347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694066018] [2021-06-12 19:59:32,365 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 [2021-06-12 19:59:32,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:32,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:32,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:59:32,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,512 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 [2021-06-12 19:59:32,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,515 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 15 treesize of output 11 [2021-06-12 19:59:32,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,570 INFO L628 ElimStorePlain]: treesize reduction 39, result has 64.2 percent of original size [2021-06-12 19:59:32,572 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. [2021-06-12 19:59:32,572 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:130, output treesize:70 [2021-06-12 19:59:32,691 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1537, array_4], 1=[array_0, v_prenex_1536]} [2021-06-12 19:59:32,694 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 15 treesize of output 11 [2021-06-12 19:59:32,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:32,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,727 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:59:32,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:32,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:32,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,746 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 [2021-06-12 19:59:32,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,748 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 [2021-06-12 19:59:32,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:32,768 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1536 vanished before elimination [2021-06-12 19:59:32,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:32,769 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:59:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694066018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:32,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:32,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093135755] [2021-06-12 19:59:32,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:32,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:32,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:32,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:32,790 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) [2021-06-12 19:59:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:33,243 INFO L93 Difference]: Finished difference Result 565 states and 1734 transitions. [2021-06-12 19:59:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:33,243 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 [2021-06-12 19:59:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:33,244 INFO L225 Difference]: With dead ends: 565 [2021-06-12 19:59:33,244 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 19:59:33,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 19:59:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 398. [2021-06-12 19:59:33,248 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) [2021-06-12 19:59:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1280 transitions. [2021-06-12 19:59:33,249 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1280 transitions. Word has length 18 [2021-06-12 19:59:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:33,249 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1280 transitions. [2021-06-12 19:59:33,249 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) [2021-06-12 19:59:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1280 transitions. [2021-06-12 19:59:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:33,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:33,249 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:33,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5925 [2021-06-12 19:59:33,453 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 385659860, now seen corresponding path program 197 times [2021-06-12 19:59:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:33,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381153291] [2021-06-12 19:59:33,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381153291] [2021-06-12 19:59:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381153291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485176570] [2021-06-12 19:59:33,569 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 [2021-06-12 19:59:33,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:33,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:33,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,714 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 [2021-06-12 19:59:33,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,717 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 15 treesize of output 11 [2021-06-12 19:59:33,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,744 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. [2021-06-12 19:59:33,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-12 19:59:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,816 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 15 treesize of output 11 [2021-06-12 19:59:33,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:33,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,863 INFO L628 ElimStorePlain]: treesize reduction 45, result has 57.5 percent of original size [2021-06-12 19:59:33,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,866 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 27 treesize of output 21 [2021-06-12 19:59:33,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:33,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:33,891 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 [2021-06-12 19:59:33,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,894 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 11 treesize of output 3 [2021-06-12 19:59:33,894 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:33,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:33,921 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1540 vanished before elimination [2021-06-12 19:59:33,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:33,922 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-12 19:59:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:33,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485176570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:33,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:33,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:33,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174105311] [2021-06-12 19:59:33,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:33,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:33,981 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) [2021-06-12 19:59:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:34,474 INFO L93 Difference]: Finished difference Result 561 states and 1738 transitions. [2021-06-12 19:59:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:34,474 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 [2021-06-12 19:59:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:34,475 INFO L225 Difference]: With dead ends: 561 [2021-06-12 19:59:34,475 INFO L226 Difference]: Without dead ends: 548 [2021-06-12 19:59:34,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-12 19:59:34,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 398. [2021-06-12 19:59:34,479 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) [2021-06-12 19:59:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1280 transitions. [2021-06-12 19:59:34,480 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1280 transitions. Word has length 18 [2021-06-12 19:59:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:34,480 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1280 transitions. [2021-06-12 19:59:34,480 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) [2021-06-12 19:59:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1280 transitions. [2021-06-12 19:59:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:34,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:34,480 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:34,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5941,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,701 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:34,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:34,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2013206684, now seen corresponding path program 198 times [2021-06-12 19:59:34,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:34,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222780452] [2021-06-12 19:59:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222780452] [2021-06-12 19:59:34,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222780452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333270724] [2021-06-12 19:59:34,855 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 [2021-06-12 19:59:34,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:59:34,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:34,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:34,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,989 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 15 treesize of output 11 [2021-06-12 19:59:34,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,993 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 34 treesize of output 26 [2021-06-12 19:59:34,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,998 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 24 treesize of output 18 [2021-06-12 19:59:34,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,002 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 [2021-06-12 19:59:35,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,005 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 35 treesize of output 27 [2021-06-12 19:59:35,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 19:59:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,010 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 25 treesize of output 19 [2021-06-12 19:59:35,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,121 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 19:59:35,121 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.3 percent of original size [2021-06-12 19:59:35,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:35,122 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-06-12 19:59:35,418 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-12 19:59:35,557 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-12 19:59:35,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,562 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 [2021-06-12 19:59:35,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,568 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 27 treesize of output 21 [2021-06-12 19:59:35,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,573 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 26 treesize of output 20 [2021-06-12 19:59:35,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,579 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 15 treesize of output 11 [2021-06-12 19:59:35,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,584 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 [2021-06-12 19:59:35,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,589 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 28 treesize of output 22 [2021-06-12 19:59:35,590 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,594 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 28 treesize of output 22 [2021-06-12 19:59:35,595 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,600 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 [2021-06-12 19:59:35,600 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,605 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 16 treesize of output 12 [2021-06-12 19:59:35,605 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,609 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 16 treesize of output 12 [2021-06-12 19:59:35,610 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,615 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 15 treesize of output 11 [2021-06-12 19:59:35,615 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,620 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 28 treesize of output 22 [2021-06-12 19:59:35,620 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:35,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,625 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 25 treesize of output 19 [2021-06-12 19:59:35,626 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,630 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 25 treesize of output 19 [2021-06-12 19:59:35,631 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,776 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-12 19:59:35,776 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 19:59:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,781 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 20 treesize of output 9 [2021-06-12 19:59:35,781 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,785 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 20 treesize of output 9 [2021-06-12 19:59:35,786 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:35,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:59:35,840 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 19:59:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333270724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:35,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761130869] [2021-06-12 19:59:35,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:35,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:35,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:35,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:35,924 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) [2021-06-12 19:59:36,379 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 19:59:36,694 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 120 [2021-06-12 19:59:37,168 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-12 19:59:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:37,352 INFO L93 Difference]: Finished difference Result 564 states and 1721 transitions. [2021-06-12 19:59:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:37,353 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 [2021-06-12 19:59:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:37,354 INFO L225 Difference]: With dead ends: 564 [2021-06-12 19:59:37,354 INFO L226 Difference]: Without dead ends: 544 [2021-06-12 19:59:37,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1560.0ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-12 19:59:37,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 400. [2021-06-12 19:59:37,358 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) [2021-06-12 19:59:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1285 transitions. [2021-06-12 19:59:37,358 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1285 transitions. Word has length 18 [2021-06-12 19:59:37,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:37,358 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1285 transitions. [2021-06-12 19:59:37,358 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) [2021-06-12 19:59:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1285 transitions. [2021-06-12 19:59:37,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:37,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:37,359 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:37,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5954,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:37,560 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:37,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:37,560 INFO L82 PathProgramCache]: Analyzing trace with hash -584251578, now seen corresponding path program 199 times [2021-06-12 19:59:37,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:37,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002492788] [2021-06-12 19:59:37,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:37,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002492788] [2021-06-12 19:59:37,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002492788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813190746] [2021-06-12 19:59:37,767 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 [2021-06-12 19:59:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,910 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 26 treesize of output 20 [2021-06-12 19:59:37,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,914 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 [2021-06-12 19:59:37,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,918 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 15 treesize of output 11 [2021-06-12 19:59:37,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,922 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 16 treesize of output 12 [2021-06-12 19:59:37,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,996 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-12 19:59:37,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:37,997 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-12 19:59:38,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,222 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 17 treesize of output 13 [2021-06-12 19:59:38,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,227 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 15 treesize of output 11 [2021-06-12 19:59:38,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,291 INFO L628 ElimStorePlain]: treesize reduction 104, result has 43.5 percent of original size [2021-06-12 19:59:38,291 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:59:38,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:38,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1553 vanished before elimination [2021-06-12 19:59:38,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,321 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 27 treesize of output 21 [2021-06-12 19:59:38,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:38,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,358 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 11 treesize of output 3 [2021-06-12 19:59:38,359 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,364 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 21 treesize of output 7 [2021-06-12 19:59:38,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:38,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:38,397 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:198, output treesize:46 [2021-06-12 19:59:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:38,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813190746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:38,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093524512] [2021-06-12 19:59:38,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:38,474 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) [2021-06-12 19:59:38,924 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-12 19:59:39,114 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2021-06-12 19:59:39,365 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 19:59:39,740 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-12 19:59:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:39,904 INFO L93 Difference]: Finished difference Result 555 states and 1694 transitions. [2021-06-12 19:59:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:59:39,904 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 [2021-06-12 19:59:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:39,905 INFO L225 Difference]: With dead ends: 555 [2021-06-12 19:59:39,905 INFO L226 Difference]: Without dead ends: 539 [2021-06-12 19:59:39,905 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1514.3ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-12 19:59:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 396. [2021-06-12 19:59:39,913 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) [2021-06-12 19:59:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1271 transitions. [2021-06-12 19:59:39,913 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1271 transitions. Word has length 18 [2021-06-12 19:59:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:39,913 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1271 transitions. [2021-06-12 19:59:39,913 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) [2021-06-12 19:59:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1271 transitions. [2021-06-12 19:59:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:39,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:39,914 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5987 [2021-06-12 19:59:40,114 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,115 INFO L82 PathProgramCache]: Analyzing trace with hash 934576270, now seen corresponding path program 200 times [2021-06-12 19:59:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653463507] [2021-06-12 19:59:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:40,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653463507] [2021-06-12 19:59:40,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653463507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424789095] [2021-06-12 19:59:40,285 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 [2021-06-12 19:59:40,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:40,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:40,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:40,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:40,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,393 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 [2021-06-12 19:59:40,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,398 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 24 treesize of output 18 [2021-06-12 19:59:40,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,401 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 26 treesize of output 20 [2021-06-12 19:59:40,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,406 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 16 treesize of output 12 [2021-06-12 19:59:40,406 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,410 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 25 treesize of output 19 [2021-06-12 19:59:40,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,413 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 15 treesize of output 11 [2021-06-12 19:59:40,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,495 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-12 19:59:40,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:40,496 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 19:59:40,727 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1562], 1=[array_0, v_prenex_1561]} [2021-06-12 19:59:40,730 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 25 treesize of output 19 [2021-06-12 19:59:40,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,733 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 15 treesize of output 11 [2021-06-12 19:59:40,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,764 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 19:59:40,766 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 [2021-06-12 19:59:40,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:40,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,781 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:59:40,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,784 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 11 treesize of output 3 [2021-06-12 19:59:40,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,786 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 21 treesize of output 7 [2021-06-12 19:59:40,787 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:40,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:40,807 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 19:59:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424789095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:40,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:40,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413134827] [2021-06-12 19:59:40,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:40,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:40,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:40,828 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) [2021-06-12 19:59:41,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:41,410 INFO L93 Difference]: Finished difference Result 543 states and 1672 transitions. [2021-06-12 19:59:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:41,410 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 [2021-06-12 19:59:41,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:41,411 INFO L225 Difference]: With dead ends: 543 [2021-06-12 19:59:41,411 INFO L226 Difference]: Without dead ends: 538 [2021-06-12 19:59:41,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 709.3ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-12 19:59:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 399. [2021-06-12 19:59:41,415 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) [2021-06-12 19:59:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1283 transitions. [2021-06-12 19:59:41,416 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1283 transitions. Word has length 18 [2021-06-12 19:59:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:41,416 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1283 transitions. [2021-06-12 19:59:41,416 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) [2021-06-12 19:59:41,416 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1283 transitions. [2021-06-12 19:59:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:41,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:41,416 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:41,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6004 [2021-06-12 19:59:41,617 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1005412476, now seen corresponding path program 201 times [2021-06-12 19:59:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:41,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928298373] [2021-06-12 19:59:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:41,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928298373] [2021-06-12 19:59:41,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928298373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104892022] [2021-06-12 19:59:41,755 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 [2021-06-12 19:59:41,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:41,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:41,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:41,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:59:41,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,867 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 18 treesize of output 14 [2021-06-12 19:59:41,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,870 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 [2021-06-12 19:59:41,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,873 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:41,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,915 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-12 19:59:41,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:41,916 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-12 19:59:42,063 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:59:42,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,066 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 27 treesize of output 21 [2021-06-12 19:59:42,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:42,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,070 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 17 treesize of output 13 [2021-06-12 19:59:42,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,074 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 [2021-06-12 19:59:42,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,078 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 15 treesize of output 11 [2021-06-12 19:59:42,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,151 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 19:59:42,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,154 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 9 treesize of output 3 [2021-06-12 19:59:42,155 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,158 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 11 treesize of output 3 [2021-06-12 19:59:42,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:42,161 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 [2021-06-12 19:59:42,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:42,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:42,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:42,199 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-06-12 19:59:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:42,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104892022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:42,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:42,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:42,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810090176] [2021-06-12 19:59:42,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:42,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:42,276 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) [2021-06-12 19:59:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:42,840 INFO L93 Difference]: Finished difference Result 557 states and 1716 transitions. [2021-06-12 19:59:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:59:42,841 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 [2021-06-12 19:59:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:42,841 INFO L225 Difference]: With dead ends: 557 [2021-06-12 19:59:42,841 INFO L226 Difference]: Without dead ends: 552 [2021-06-12 19:59:42,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 605.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:42,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-12 19:59:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 397. [2021-06-12 19:59:42,845 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) [2021-06-12 19:59:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1273 transitions. [2021-06-12 19:59:42,850 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1273 transitions. Word has length 18 [2021-06-12 19:59:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:42,851 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1273 transitions. [2021-06-12 19:59:42,851 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) [2021-06-12 19:59:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1273 transitions. [2021-06-12 19:59:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:42,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:42,851 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:43,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6022 [2021-06-12 19:59:43,052 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:43,052 INFO L82 PathProgramCache]: Analyzing trace with hash 119770116, now seen corresponding path program 202 times [2021-06-12 19:59:43,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:43,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807757557] [2021-06-12 19:59:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807757557] [2021-06-12 19:59:43,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807757557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679439302] [2021-06-12 19:59:43,231 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 [2021-06-12 19:59:43,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:43,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:43,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:43,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,340 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 25 treesize of output 19 [2021-06-12 19:59:43,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,344 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 24 treesize of output 18 [2021-06-12 19:59:43,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,347 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 26 treesize of output 20 [2021-06-12 19:59:43,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,352 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 16 treesize of output 12 [2021-06-12 19:59:43,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,355 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 25 treesize of output 19 [2021-06-12 19:59:43,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,359 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 15 treesize of output 11 [2021-06-12 19:59:43,360 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,441 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-12 19:59:43,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:43,442 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 19:59:43,571 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1569], 1=[array_0, v_prenex_1568]} [2021-06-12 19:59:43,574 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 25 treesize of output 19 [2021-06-12 19:59:43,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:43,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,580 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 15 treesize of output 11 [2021-06-12 19:59:43,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,629 INFO L628 ElimStorePlain]: treesize reduction 69, result has 48.1 percent of original size [2021-06-12 19:59:43,631 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 27 treesize of output 21 [2021-06-12 19:59:43,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,655 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:59:43,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,657 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 21 treesize of output 7 [2021-06-12 19:59:43,658 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,660 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 11 treesize of output 3 [2021-06-12 19:59:43,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:43,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:43,688 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:154, output treesize:53 [2021-06-12 19:59:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679439302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:43,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500737582] [2021-06-12 19:59:43,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:43,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:43,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:43,755 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) [2021-06-12 19:59:44,173 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-12 19:59:44,435 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-12 19:59:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,582 INFO L93 Difference]: Finished difference Result 534 states and 1648 transitions. [2021-06-12 19:59:44,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:44,582 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 [2021-06-12 19:59:44,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,583 INFO L225 Difference]: With dead ends: 534 [2021-06-12 19:59:44,583 INFO L226 Difference]: Without dead ends: 528 [2021-06-12 19:59:44,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-12 19:59:44,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 396. [2021-06-12 19:59:44,587 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) [2021-06-12 19:59:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1271 transitions. [2021-06-12 19:59:44,587 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1271 transitions. Word has length 18 [2021-06-12 19:59:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,588 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1271 transitions. [2021-06-12 19:59:44,588 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) [2021-06-12 19:59:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1271 transitions. [2021-06-12 19:59:44,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:44,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,588 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:44,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6035,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,789 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2110473790, now seen corresponding path program 203 times [2021-06-12 19:59:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:44,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757812128] [2021-06-12 19:59:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:44,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757812128] [2021-06-12 19:59:44,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757812128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761897175] [2021-06-12 19:59:44,968 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 [2021-06-12 19:59:44,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:44,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:44,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:44,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:45,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,121 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 15 treesize of output 11 [2021-06-12 19:59:45,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,125 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 17 treesize of output 13 [2021-06-12 19:59:45,126 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,129 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 [2021-06-12 19:59:45,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,132 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 27 treesize of output 21 [2021-06-12 19:59:45,133 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:45,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,188 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. [2021-06-12 19:59:45,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:149, output treesize:137 [2021-06-12 19:59:45,313 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 19:59:45,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,317 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 25 treesize of output 19 [2021-06-12 19:59:45,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,321 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 28 treesize of output 22 [2021-06-12 19:59:45,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:45,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,329 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 15 treesize of output 11 [2021-06-12 19:59:45,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,333 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 26 treesize of output 20 [2021-06-12 19:59:45,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,337 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 18 treesize of output 14 [2021-06-12 19:59:45,338 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,342 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 [2021-06-12 19:59:45,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,347 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 18 treesize of output 14 [2021-06-12 19:59:45,347 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,351 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 17 treesize of output 13 [2021-06-12 19:59:45,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,355 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 16 treesize of output 12 [2021-06-12 19:59:45,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,492 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-06-12 19:59:45,492 INFO L628 ElimStorePlain]: treesize reduction 75, result has 68.5 percent of original size [2021-06-12 19:59:45,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,496 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 20 treesize of output 9 [2021-06-12 19:59:45,497 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,500 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 10 treesize of output 5 [2021-06-12 19:59:45,501 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:45,504 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 9 treesize of output 3 [2021-06-12 19:59:45,504 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:45,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:45,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 19:59:45,565 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 6 variables, input treesize:385, output treesize:90 [2021-06-12 19:59:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761897175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:45,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:45,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721709941] [2021-06-12 19:59:45,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:45,698 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) [2021-06-12 19:59:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:46,218 INFO L93 Difference]: Finished difference Result 550 states and 1696 transitions. [2021-06-12 19:59:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:46,219 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 [2021-06-12 19:59:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:46,220 INFO L225 Difference]: With dead ends: 550 [2021-06-12 19:59:46,220 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 19:59:46,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 686.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:46,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 19:59:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 394. [2021-06-12 19:59:46,223 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) [2021-06-12 19:59:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1266 transitions. [2021-06-12 19:59:46,224 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1266 transitions. Word has length 18 [2021-06-12 19:59:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:46,224 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 1266 transitions. [2021-06-12 19:59:46,224 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) [2021-06-12 19:59:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1266 transitions. [2021-06-12 19:59:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:46,225 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:46,225 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:46,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6048 [2021-06-12 19:59:46,447 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:46,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:46,447 INFO L82 PathProgramCache]: Analyzing trace with hash -703930412, now seen corresponding path program 204 times [2021-06-12 19:59:46,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:46,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051994364] [2021-06-12 19:59:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:46,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:46,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051994364] [2021-06-12 19:59:46,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051994364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674789090] [2021-06-12 19:59:46,701 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 [2021-06-12 19:59:46,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:59:46,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,811 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 25 treesize of output 19 [2021-06-12 19:59:46,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,815 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 24 treesize of output 18 [2021-06-12 19:59:46,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,819 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 26 treesize of output 20 [2021-06-12 19:59:46,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,823 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 16 treesize of output 12 [2021-06-12 19:59:46,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,827 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 [2021-06-12 19:59:46,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,831 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 [2021-06-12 19:59:46,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,912 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-12 19:59:46,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:46,913 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 19:59:46,988 INFO L446 ElimStorePlain]: Different costs {0=[array_0, array_4], 1=[v_prenex_1574, v_prenex_1573, v_prenex_1576, v_prenex_1575, v_prenex_1578, v_prenex_1577]} [2021-06-12 19:59:46,992 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 18 treesize of output 14 [2021-06-12 19:59:46,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,078 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-06-12 19:59:47,078 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:59:47,081 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 18 treesize of output 14 [2021-06-12 19:59:47,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,130 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2021-06-12 19:59:47,130 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1573 vanished before elimination [2021-06-12 19:59:47,133 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 [2021-06-12 19:59:47,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:47,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,164 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 [2021-06-12 19:59:47,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,167 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 [2021-06-12 19:59:47,167 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,206 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 [2021-06-12 19:59:47,213 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:47,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1577 vanished before elimination [2021-06-12 19:59:47,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:47,237 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-06-12 19:59:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674789090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:47,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:47,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831797741] [2021-06-12 19:59:47,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:47,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:47,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:47,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:47,344 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) [2021-06-12 19:59:47,833 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-06-12 19:59:48,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:48,324 INFO L93 Difference]: Finished difference Result 609 states and 1849 transitions. [2021-06-12 19:59:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:48,324 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 [2021-06-12 19:59:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:48,325 INFO L225 Difference]: With dead ends: 609 [2021-06-12 19:59:48,325 INFO L226 Difference]: Without dead ends: 604 [2021-06-12 19:59:48,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 985.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-06-12 19:59:48,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 395. [2021-06-12 19:59:48,330 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) [2021-06-12 19:59:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1269 transitions. [2021-06-12 19:59:48,331 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1269 transitions. Word has length 18 [2021-06-12 19:59:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:48,331 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1269 transitions. [2021-06-12 19:59:48,331 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) [2021-06-12 19:59:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1269 transitions. [2021-06-12 19:59:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:48,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:48,332 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:48,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6078 [2021-06-12 19:59:48,541 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash 657625694, now seen corresponding path program 205 times [2021-06-12 19:59:48,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:48,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079285323] [2021-06-12 19:59:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079285323] [2021-06-12 19:59:48,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079285323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094290507] [2021-06-12 19:59:48,739 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 [2021-06-12 19:59:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:48,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:48,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,858 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 25 treesize of output 19 [2021-06-12 19:59:48,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,862 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 18 [2021-06-12 19:59:48,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,866 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 26 treesize of output 20 [2021-06-12 19:59:48,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,870 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 16 treesize of output 12 [2021-06-12 19:59:48,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,874 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 25 treesize of output 19 [2021-06-12 19:59:48,874 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,877 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 15 treesize of output 11 [2021-06-12 19:59:48,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,959 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-12 19:59:48,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:48,960 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 19:59:49,034 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_1584, v_prenex_1579]} [2021-06-12 19:59:49,038 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 [2021-06-12 19:59:49,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,121 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-06-12 19:59:49,121 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:59:49,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,124 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 [2021-06-12 19:59:49,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,173 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.9 percent of original size [2021-06-12 19:59:49,175 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 27 treesize of output 21 [2021-06-12 19:59:49,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:49,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,205 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 7 treesize of output 5 [2021-06-12 19:59:49,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,230 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1582 vanished before elimination [2021-06-12 19:59:49,230 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1584 vanished before elimination [2021-06-12 19:59:49,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,233 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 11 treesize of output 3 [2021-06-12 19:59:49,234 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,236 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 21 treesize of output 7 [2021-06-12 19:59:49,237 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:49,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:49,267 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-06-12 19:59:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094290507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:49,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:49,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597512331] [2021-06-12 19:59:49,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:49,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:49,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:49,382 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) [2021-06-12 19:59:49,728 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-12 19:59:50,026 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-06-12 19:59:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:50,085 INFO L93 Difference]: Finished difference Result 536 states and 1653 transitions. [2021-06-12 19:59:50,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:59:50,086 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 [2021-06-12 19:59:50,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:50,087 INFO L225 Difference]: With dead ends: 536 [2021-06-12 19:59:50,087 INFO L226 Difference]: Without dead ends: 530 [2021-06-12 19:59:50,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 829.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-12 19:59:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 392. [2021-06-12 19:59:50,090 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) [2021-06-12 19:59:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1255 transitions. [2021-06-12 19:59:50,091 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1255 transitions. Word has length 18 [2021-06-12 19:59:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:50,091 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 1255 transitions. [2021-06-12 19:59:50,091 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) [2021-06-12 19:59:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1255 transitions. [2021-06-12 19:59:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:50,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:50,092 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6095,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,292 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -187420450, now seen corresponding path program 206 times [2021-06-12 19:59:50,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311340786] [2021-06-12 19:59:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311340786] [2021-06-12 19:59:50,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311340786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755928625] [2021-06-12 19:59:50,461 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 [2021-06-12 19:59:50,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:50,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:50,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:50,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,600 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 27 treesize of output 21 [2021-06-12 19:59:50,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:50,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,604 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 [2021-06-12 19:59:50,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,607 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 25 treesize of output 19 [2021-06-12 19:59:50,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,611 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 15 treesize of output 11 [2021-06-12 19:59:50,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:50,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:50,649 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-12 19:59:50,986 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-12 19:59:50,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,990 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 16 treesize of output 12 [2021-06-12 19:59:50,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:50,995 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 15 treesize of output 11 [2021-06-12 19:59:50,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:50,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,000 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 20 treesize of output 16 [2021-06-12 19:59:51,001 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,004 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 18 treesize of output 14 [2021-06-12 19:59:51,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,009 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 26 treesize of output 20 [2021-06-12 19:59:51,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,014 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 29 treesize of output 23 [2021-06-12 19:59:51,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 19:59:51,022 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,028 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 17 treesize of output 13 [2021-06-12 19:59:51,028 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,034 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 16 treesize of output 12 [2021-06-12 19:59:51,035 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,041 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 28 treesize of output 22 [2021-06-12 19:59:51,042 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,046 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 [2021-06-12 19:59:51,047 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,050 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 [2021-06-12 19:59:51,051 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,199 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 19:59:51,199 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.3 percent of original size [2021-06-12 19:59:51,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 19:59:51,204 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,208 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 21 treesize of output 7 [2021-06-12 19:59:51,208 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,211 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 9 treesize of output 3 [2021-06-12 19:59:51,212 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:51,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 19:59:51,274 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:405, output treesize:77 [2021-06-12 19:59:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755928625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:51,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545016817] [2021-06-12 19:59:51,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:51,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:51,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:51,375 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) [2021-06-12 19:59:51,859 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 19:59:52,085 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2021-06-12 19:59:52,323 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-12 19:59:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,727 INFO L93 Difference]: Finished difference Result 579 states and 1760 transitions. [2021-06-12 19:59:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:52,727 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 [2021-06-12 19:59:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,728 INFO L225 Difference]: With dead ends: 579 [2021-06-12 19:59:52,728 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 19:59:52,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1443.5ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:52,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 19:59:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 401. [2021-06-12 19:59:52,732 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) [2021-06-12 19:59:52,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1285 transitions. [2021-06-12 19:59:52,733 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1285 transitions. Word has length 18 [2021-06-12 19:59:52,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,733 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1285 transitions. [2021-06-12 19:59:52,733 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) [2021-06-12 19:59:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1285 transitions. [2021-06-12 19:59:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:52,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,734 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:52,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6112 [2021-06-12 19:59:52,945 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:52,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:52,946 INFO L82 PathProgramCache]: Analyzing trace with hash -932373022, now seen corresponding path program 207 times [2021-06-12 19:59:52,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:52,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477864695] [2021-06-12 19:59:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477864695] [2021-06-12 19:59:53,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477864695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334034644] [2021-06-12 19:59:53,145 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 [2021-06-12 19:59:53,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:59:53,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:53,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:53,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,279 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 18 [2021-06-12 19:59:53,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,283 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 25 treesize of output 19 [2021-06-12 19:59:53,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:59:53,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,291 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 26 treesize of output 20 [2021-06-12 19:59:53,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,295 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 16 treesize of output 12 [2021-06-12 19:59:53,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,299 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 15 treesize of output 11 [2021-06-12 19:59:53,299 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,382 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-12 19:59:53,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:53,383 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 19:59:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,630 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 15 treesize of output 11 [2021-06-12 19:59:53,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:53,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,700 INFO L628 ElimStorePlain]: treesize reduction 82, result has 48.4 percent of original size [2021-06-12 19:59:53,700 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 19:59:53,703 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 [2021-06-12 19:59:53,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:53,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,733 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 10 treesize of output 5 [2021-06-12 19:59:53,734 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:53,736 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 20 treesize of output 9 [2021-06-12 19:59:53,737 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:53,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:53,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:53,793 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1601 vanished before elimination [2021-06-12 19:59:53,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:53,795 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 19:59:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334034644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:53,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:53,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617803588] [2021-06-12 19:59:53,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:53,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:53,856 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) [2021-06-12 19:59:54,291 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-12 19:59:54,558 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2021-06-12 19:59:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,111 INFO L93 Difference]: Finished difference Result 615 states and 1856 transitions. [2021-06-12 19:59:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:59:55,111 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 [2021-06-12 19:59:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,112 INFO L225 Difference]: With dead ends: 615 [2021-06-12 19:59:55,112 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 19:59:55,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1331.4ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:59:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 19:59:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 403. [2021-06-12 19:59:55,116 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) [2021-06-12 19:59:55,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1302 transitions. [2021-06-12 19:59:55,117 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1302 transitions. Word has length 18 [2021-06-12 19:59:55,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,117 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1302 transitions. [2021-06-12 19:59:55,117 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) [2021-06-12 19:59:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1302 transitions. [2021-06-12 19:59:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:55,118 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,118 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:55,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6130 [2021-06-12 19:59:55,318 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1141669252, now seen corresponding path program 208 times [2021-06-12 19:59:55,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:55,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655069460] [2021-06-12 19:59:55,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655069460] [2021-06-12 19:59:55,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655069460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446258452] [2021-06-12 19:59:55,439 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 [2021-06-12 19:59:55,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:55,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:55,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:55,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:55,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,547 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 16 treesize of output 12 [2021-06-12 19:59:55,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,551 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 [2021-06-12 19:59:55,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,554 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 26 treesize of output 20 [2021-06-12 19:59:55,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,557 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 [2021-06-12 19:59:55,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,599 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-12 19:59:55,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:55,599 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-12 19:59:55,739 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 19:59:55,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,743 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 [2021-06-12 19:59:55,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,746 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 25 treesize of output 19 [2021-06-12 19:59:55,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,750 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 34 treesize of output 26 [2021-06-12 19:59:55,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,754 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 [2021-06-12 19:59:55,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:55,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,760 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 [2021-06-12 19:59:55,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 19:59:55,826 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-06-12 19:59:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,830 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 21 treesize of output 7 [2021-06-12 19:59:55,830 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,833 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 11 treesize of output 3 [2021-06-12 19:59:55,833 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:55,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:55,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:55,861 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-12 19:59:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446258452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:55,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668703296] [2021-06-12 19:59:55,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:55,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:55,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:55,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:55,922 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) [2021-06-12 19:59:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:56,876 INFO L93 Difference]: Finished difference Result 660 states and 2026 transitions. [2021-06-12 19:59:56,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:59:56,876 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 [2021-06-12 19:59:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:56,877 INFO L225 Difference]: With dead ends: 660 [2021-06-12 19:59:56,877 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 19:59:56,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:59:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 19:59:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 403. [2021-06-12 19:59:56,882 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) [2021-06-12 19:59:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1302 transitions. [2021-06-12 19:59:56,882 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1302 transitions. Word has length 18 [2021-06-12 19:59:56,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:56,882 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1302 transitions. [2021-06-12 19:59:56,882 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) [2021-06-12 19:59:56,882 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1302 transitions. [2021-06-12 19:59:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:56,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:56,883 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6153 [2021-06-12 19:59:57,083 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash -922333774, now seen corresponding path program 209 times [2021-06-12 19:59:57,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155042158] [2021-06-12 19:59:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155042158] [2021-06-12 19:59:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155042158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119737077] [2021-06-12 19:59:57,274 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 [2021-06-12 19:59:57,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:57,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:57,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,411 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 [2021-06-12 19:59:57,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 19:59:57,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,415 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 17 treesize of output 13 [2021-06-12 19:59:57,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,419 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 25 treesize of output 19 [2021-06-12 19:59:57,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,423 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 15 treesize of output 11 [2021-06-12 19:59:57,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:57,461 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-12 19:59:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,542 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 18 treesize of output 14 [2021-06-12 19:59:57,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,546 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 29 treesize of output 23 [2021-06-12 19:59:57,547 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,550 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 19 treesize of output 15 [2021-06-12 19:59:57,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,554 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 17 treesize of output 13 [2021-06-12 19:59:57,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:57,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,562 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 28 treesize of output 22 [2021-06-12 19:59:57,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:57,565 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,569 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 25 treesize of output 19 [2021-06-12 19:59:57,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:57,572 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,575 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 15 treesize of output 11 [2021-06-12 19:59:57,575 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,641 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-12 19:59:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,644 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 [2021-06-12 19:59:57,645 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,647 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 21 treesize of output 7 [2021-06-12 19:59:57,647 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:57,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 19:59:57,674 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-12 19:59:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119737077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:57,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:59:57,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670278664] [2021-06-12 19:59:57,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:59:57,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:57,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:59:57,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:59:57,825 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) [2021-06-12 19:59:58,275 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 19:59:58,571 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 19:59:58,712 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-12 19:59:58,957 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-12 19:59:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:59,103 INFO L93 Difference]: Finished difference Result 559 states and 1714 transitions. [2021-06-12 19:59:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:59,103 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 [2021-06-12 19:59:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:59,104 INFO L225 Difference]: With dead ends: 559 [2021-06-12 19:59:59,104 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 19:59:59,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1356.9ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 19:59:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 402. [2021-06-12 19:59:59,108 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) [2021-06-12 19:59:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1298 transitions. [2021-06-12 19:59:59,108 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1298 transitions. Word has length 18 [2021-06-12 19:59:59,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:59,109 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1298 transitions. [2021-06-12 19:59:59,109 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) [2021-06-12 19:59:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1298 transitions. [2021-06-12 19:59:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:59,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:59,109 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:59,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6166 [2021-06-12 19:59:59,313 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:59,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:59,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1484252764, now seen corresponding path program 210 times [2021-06-12 19:59:59,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:59,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591159446] [2021-06-12 19:59:59,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:59,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:59,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591159446] [2021-06-12 19:59:59,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591159446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132698966] [2021-06-12 19:59:59,472 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 [2021-06-12 19:59:59,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:59:59,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:59:59,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,580 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 16 treesize of output 12 [2021-06-12 19:59:59,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,583 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 [2021-06-12 19:59:59,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,587 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 26 treesize of output 20 [2021-06-12 19:59:59,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,590 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 15 treesize of output 11 [2021-06-12 19:59:59,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,631 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-12 19:59:59,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:59,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-12 19:59:59,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 19:59:59,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,689 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 [2021-06-12 19:59:59,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,693 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 18 treesize of output 14 [2021-06-12 19:59:59,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,697 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 34 treesize of output 26 [2021-06-12 19:59:59,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,701 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 25 treesize of output 19 [2021-06-12 19:59:59,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,706 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 [2021-06-12 19:59:59,707 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:59,710 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,714 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 35 treesize of output 27 [2021-06-12 19:59:59,715 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 19:59:59,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:59,719 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,787 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-12 19:59:59,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:59,790 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 21 treesize of output 7 [2021-06-12 19:59:59,791 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,793 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 21 treesize of output 7 [2021-06-12 19:59:59,793 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:59,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:59,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:59,824 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-12 19:59:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:59,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132698966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:59,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:59:59,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672143228] [2021-06-12 19:59:59,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:59:59,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:59,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:59:59,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:59:59,927 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) [2021-06-12 20:00:00,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:00,354 INFO L93 Difference]: Finished difference Result 559 states and 1724 transitions. [2021-06-12 20:00:00,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:00,354 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 [2021-06-12 20:00:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:00,358 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:00:00,359 INFO L226 Difference]: Without dead ends: 554 [2021-06-12 20:00:00,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:00,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-12 20:00:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 403. [2021-06-12 20:00:00,363 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) [2021-06-12 20:00:00,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1301 transitions. [2021-06-12 20:00:00,363 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1301 transitions. Word has length 18 [2021-06-12 20:00:00,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:00,363 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1301 transitions. [2021-06-12 20:00:00,364 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) [2021-06-12 20:00:00,364 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1301 transitions. [2021-06-12 20:00:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:00,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:00,364 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:00,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6180,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,565 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1449158426, now seen corresponding path program 211 times [2021-06-12 20:00:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299228163] [2021-06-12 20:00:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299228163] [2021-06-12 20:00:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299228163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992974501] [2021-06-12 20:00:00,744 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 [2021-06-12 20:00:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,879 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 16 treesize of output 12 [2021-06-12 20:00:00,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,883 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 [2021-06-12 20:00:00,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,887 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 26 treesize of output 20 [2021-06-12 20:00:00,887 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,890 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 15 treesize of output 11 [2021-06-12 20:00:00,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,931 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-12 20:00:00,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:00,932 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-12 20:00:00,980 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 7 treesize of output 5 [2021-06-12 20:00:00,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,985 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 15 treesize of output 11 [2021-06-12 20:00:00,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,988 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 18 treesize of output 14 [2021-06-12 20:00:00,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,993 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 34 treesize of output 26 [2021-06-12 20:00:00,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,997 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 25 treesize of output 19 [2021-06-12 20:00:00,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,002 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 [2021-06-12 20:00:01,003 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:01,006 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,009 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 35 treesize of output 27 [2021-06-12 20:00:01,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:01,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:01,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,084 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-12 20:00:01,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:01,087 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 21 treesize of output 7 [2021-06-12 20:00:01,087 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,089 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 [2021-06-12 20:00:01,090 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:01,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:01,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:01,121 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-12 20:00:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:01,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992974501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:01,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:01,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:01,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495937965] [2021-06-12 20:00:01,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:01,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:01,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:01,232 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) [2021-06-12 20:00:01,700 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 20:00:01,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:01,757 INFO L93 Difference]: Finished difference Result 542 states and 1681 transitions. [2021-06-12 20:00:01,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:01,757 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 [2021-06-12 20:00:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:01,758 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:00:01,758 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 20:00:01,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 625.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 20:00:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 401. [2021-06-12 20:00:01,764 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) [2021-06-12 20:00:01,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1291 transitions. [2021-06-12 20:00:01,765 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1291 transitions. Word has length 18 [2021-06-12 20:00:01,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:01,765 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1291 transitions. [2021-06-12 20:00:01,765 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) [2021-06-12 20:00:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1291 transitions. [2021-06-12 20:00:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:01,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:01,766 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:01,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6193 [2021-06-12 20:00:01,973 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:01,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:01,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1050481716, now seen corresponding path program 212 times [2021-06-12 20:00:01,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:01,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128415230] [2021-06-12 20:00:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:02,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128415230] [2021-06-12 20:00:02,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128415230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076834574] [2021-06-12 20:00:02,161 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 [2021-06-12 20:00:02,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:02,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,306 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 27 treesize of output 21 [2021-06-12 20:00:02,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:02,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,310 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 15 treesize of output 11 [2021-06-12 20:00:02,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,314 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 17 treesize of output 13 [2021-06-12 20:00:02,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,318 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 [2021-06-12 20:00:02,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:02,357 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-12 20:00:02,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,438 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 29 treesize of output 23 [2021-06-12 20:00:02,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,443 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 17 treesize of output 13 [2021-06-12 20:00:02,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,447 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 19 treesize of output 15 [2021-06-12 20:00:02,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,451 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 28 treesize of output 22 [2021-06-12 20:00:02,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:02,455 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,459 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 [2021-06-12 20:00:02,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,463 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 18 treesize of output 14 [2021-06-12 20:00:02,464 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:02,467 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,470 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 [2021-06-12 20:00:02,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:02,473 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,540 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-12 20:00:02,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,543 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 11 treesize of output 3 [2021-06-12 20:00:02,544 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,546 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 [2021-06-12 20:00:02,546 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:02,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:02,574 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-12 20:00:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076834574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:02,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:02,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778950206] [2021-06-12 20:00:02,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:02,695 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) [2021-06-12 20:00:03,417 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-06-12 20:00:03,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:03,773 INFO L93 Difference]: Finished difference Result 608 states and 1875 transitions. [2021-06-12 20:00:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:03,773 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 [2021-06-12 20:00:03,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:03,774 INFO L225 Difference]: With dead ends: 608 [2021-06-12 20:00:03,774 INFO L226 Difference]: Without dead ends: 602 [2021-06-12 20:00:03,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1153.8ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:03,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-12 20:00:03,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 400. [2021-06-12 20:00:03,779 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) [2021-06-12 20:00:03,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1289 transitions. [2021-06-12 20:00:03,779 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1289 transitions. Word has length 18 [2021-06-12 20:00:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:03,779 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1289 transitions. [2021-06-12 20:00:03,780 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) [2021-06-12 20:00:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1289 transitions. [2021-06-12 20:00:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:03,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:03,780 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6206,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:03,981 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2097338382, now seen corresponding path program 213 times [2021-06-12 20:00:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:03,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569825098] [2021-06-12 20:00:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:04,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569825098] [2021-06-12 20:00:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569825098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500356140] [2021-06-12 20:00:04,092 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 [2021-06-12 20:00:04,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:04,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,372 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 16 treesize of output 12 [2021-06-12 20:00:04,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,376 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 25 treesize of output 19 [2021-06-12 20:00:04,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,380 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 26 treesize of output 20 [2021-06-12 20:00:04,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,384 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 15 treesize of output 11 [2021-06-12 20:00:04,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,389 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 [2021-06-12 20:00:04,389 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,392 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 16 treesize of output 12 [2021-06-12 20:00:04,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,501 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 20:00:04,501 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 20:00:04,506 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. [2021-06-12 20:00:04,506 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 20:00:04,661 INFO L446 ElimStorePlain]: Different costs {0=[array_4], 1=[array_0]} [2021-06-12 20:00:04,663 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 27 treesize of output 21 [2021-06-12 20:00:04,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:04,666 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 [2021-06-12 20:00:04,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,686 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 20:00:04,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:04,688 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 [2021-06-12 20:00:04,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:04,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:04,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:04,695 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 20:00:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:04,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500356140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:04,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:04,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:04,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652268394] [2021-06-12 20:00:04,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:04,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:04,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:04,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:04,717 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) [2021-06-12 20:00:05,319 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-12 20:00:05,451 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2021-06-12 20:00:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:05,561 INFO L93 Difference]: Finished difference Result 569 states and 1747 transitions. [2021-06-12 20:00:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:05,561 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 [2021-06-12 20:00:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:05,562 INFO L225 Difference]: With dead ends: 569 [2021-06-12 20:00:05,562 INFO L226 Difference]: Without dead ends: 563 [2021-06-12 20:00:05,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-12 20:00:05,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 406. [2021-06-12 20:00:05,566 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) [2021-06-12 20:00:05,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1304 transitions. [2021-06-12 20:00:05,567 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1304 transitions. Word has length 18 [2021-06-12 20:00:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:05,567 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1304 transitions. [2021-06-12 20:00:05,567 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) [2021-06-12 20:00:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1304 transitions. [2021-06-12 20:00:05,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:05,568 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:05,568 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6221 [2021-06-12 20:00:05,768 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,769 INFO L82 PathProgramCache]: Analyzing trace with hash -716391044, now seen corresponding path program 214 times [2021-06-12 20:00:05,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386465673] [2021-06-12 20:00:05,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:05,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386465673] [2021-06-12 20:00:05,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386465673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015940733] [2021-06-12 20:00:05,895 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 [2021-06-12 20:00:05,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:05,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:05,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:06,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,169 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 16 treesize of output 12 [2021-06-12 20:00:06,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,173 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 [2021-06-12 20:00:06,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,177 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 15 treesize of output 11 [2021-06-12 20:00:06,177 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,181 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 16 treesize of output 12 [2021-06-12 20:00:06,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,185 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 [2021-06-12 20:00:06,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,189 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 [2021-06-12 20:00:06,190 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,298 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 20:00:06,299 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 20:00:06,302 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. [2021-06-12 20:00:06,303 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 20:00:06,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,429 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 [2021-06-12 20:00:06,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:06,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,488 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-06-12 20:00:06,490 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 27 treesize of output 21 [2021-06-12 20:00:06,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:06,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,528 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 [2021-06-12 20:00:06,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,531 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 21 treesize of output 7 [2021-06-12 20:00:06,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,563 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:06,565 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 [2021-06-12 20:00:06,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:06,589 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1621 vanished before elimination [2021-06-12 20:00:06,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:06,590 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 20:00:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015940733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:06,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:06,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935379789] [2021-06-12 20:00:06,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:06,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:06,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:06,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:06,648 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) [2021-06-12 20:00:07,242 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2021-06-12 20:00:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:07,471 INFO L93 Difference]: Finished difference Result 568 states and 1745 transitions. [2021-06-12 20:00:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:07,471 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 [2021-06-12 20:00:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:07,472 INFO L225 Difference]: With dead ends: 568 [2021-06-12 20:00:07,472 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 20:00:07,472 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 985.9ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:07,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 20:00:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 404. [2021-06-12 20:00:07,476 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) [2021-06-12 20:00:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1299 transitions. [2021-06-12 20:00:07,477 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1299 transitions. Word has length 18 [2021-06-12 20:00:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:07,477 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1299 transitions. [2021-06-12 20:00:07,477 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) [2021-06-12 20:00:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1299 transitions. [2021-06-12 20:00:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:07,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:07,478 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:07,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6237,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:07,682 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2032548348, now seen corresponding path program 215 times [2021-06-12 20:00:07,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:07,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773989615] [2021-06-12 20:00:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773989615] [2021-06-12 20:00:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773989615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848905119] [2021-06-12 20:00:07,806 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 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 [2021-06-12 20:00:07,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:07,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:07,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:08,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,094 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 27 treesize of output 21 [2021-06-12 20:00:08,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:08,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,099 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 [2021-06-12 20:00:08,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,162 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 17 treesize of output 13 [2021-06-12 20:00:08,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,166 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 15 treesize of output 11 [2021-06-12 20:00:08,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:08,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,227 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 17 treesize of output 13 [2021-06-12 20:00:08,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,231 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 15 treesize of output 11 [2021-06-12 20:00:08,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:08,289 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. [2021-06-12 20:00:08,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-12 20:00:08,450 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 20:00:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,454 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 26 treesize of output 20 [2021-06-12 20:00:08,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,459 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 28 treesize of output 22 [2021-06-12 20:00:08,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,464 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 19 treesize of output 15 [2021-06-12 20:00:08,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,468 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 15 treesize of output 11 [2021-06-12 20:00:08,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,473 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 25 treesize of output 19 [2021-06-12 20:00:08,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,478 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 16 treesize of output 12 [2021-06-12 20:00:08,478 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,482 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 18 treesize of output 14 [2021-06-12 20:00:08,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,487 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 16 treesize of output 12 [2021-06-12 20:00:08,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,491 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 17 treesize of output 13 [2021-06-12 20:00:08,492 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,496 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 29 treesize of output 23 [2021-06-12 20:00:08,497 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,501 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 15 treesize of output 11 [2021-06-12 20:00:08,501 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:08,505 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,642 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-12 20:00:08,643 INFO L628 ElimStorePlain]: treesize reduction 95, result has 60.4 percent of original size [2021-06-12 20:00:08,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,647 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 9 treesize of output 3 [2021-06-12 20:00:08,647 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,651 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 21 treesize of output 7 [2021-06-12 20:00:08,651 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,654 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 11 treesize of output 3 [2021-06-12 20:00:08,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:08,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 20:00:08,707 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-06-12 20:00:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848905119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:08,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517421578] [2021-06-12 20:00:08,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:08,790 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) [2021-06-12 20:00:09,485 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2021-06-12 20:00:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:09,741 INFO L93 Difference]: Finished difference Result 570 states and 1750 transitions. [2021-06-12 20:00:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:09,742 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 [2021-06-12 20:00:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:09,744 INFO L225 Difference]: With dead ends: 570 [2021-06-12 20:00:09,744 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 20:00:09,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:00:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 20:00:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 402. [2021-06-12 20:00:09,749 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) [2021-06-12 20:00:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1294 transitions. [2021-06-12 20:00:09,750 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1294 transitions. Word has length 18 [2021-06-12 20:00:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:09,751 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1294 transitions. [2021-06-12 20:00:09,751 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) [2021-06-12 20:00:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1294 transitions. [2021-06-12 20:00:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:09,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:09,751 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:09,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6255 [2021-06-12 20:00:09,952 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1727189146, now seen corresponding path program 216 times [2021-06-12 20:00:09,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:09,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995930345] [2021-06-12 20:00:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:10,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:10,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995930345] [2021-06-12 20:00:10,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995930345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674962278] [2021-06-12 20:00:10,090 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 [2021-06-12 20:00:10,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:10,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:10,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:10,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:10,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,223 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 24 treesize of output 18 [2021-06-12 20:00:10,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,227 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 34 treesize of output 26 [2021-06-12 20:00:10,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,238 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 35 treesize of output 27 [2021-06-12 20:00:10,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,243 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 [2021-06-12 20:00:10,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,247 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 25 treesize of output 19 [2021-06-12 20:00:10,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,251 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 [2021-06-12 20:00:10,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,380 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 20:00:10,380 INFO L628 ElimStorePlain]: treesize reduction 68, result has 76.3 percent of original size [2021-06-12 20:00:10,387 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. [2021-06-12 20:00:10,387 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:247, output treesize:219 [2021-06-12 20:00:10,646 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-06-12 20:00:10,724 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-06-12 20:00:10,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,730 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 29 treesize of output 23 [2021-06-12 20:00:10,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,736 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 [2021-06-12 20:00:10,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,742 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 46 treesize of output 36 [2021-06-12 20:00:10,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,754 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 26 treesize of output 20 [2021-06-12 20:00:10,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,760 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 47 treesize of output 37 [2021-06-12 20:00:10,761 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,766 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 28 treesize of output 22 [2021-06-12 20:00:10,767 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,772 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 28 treesize of output 22 [2021-06-12 20:00:10,773 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,778 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 29 treesize of output 23 [2021-06-12 20:00:10,779 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,783 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 29 treesize of output 23 [2021-06-12 20:00:10,784 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:10,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,790 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 25 treesize of output 19 [2021-06-12 20:00:10,791 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,796 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 28 treesize of output 22 [2021-06-12 20:00:10,804 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,813 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 15 treesize of output 11 [2021-06-12 20:00:10,814 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:10,821 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 [2021-06-12 20:00:10,822 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:10,827 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 16 treesize of output 12 [2021-06-12 20:00:10,827 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,029 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-12 20:00:11,030 INFO L628 ElimStorePlain]: treesize reduction 252, result has 44.7 percent of original size [2021-06-12 20:00:11,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,034 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 21 treesize of output 7 [2021-06-12 20:00:11,035 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,039 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 21 treesize of output 7 [2021-06-12 20:00:11,039 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:11,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:00:11,120 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:659, output treesize:116 [2021-06-12 20:00:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674962278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:11,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:11,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880705734] [2021-06-12 20:00:11,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:11,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:11,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:11,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:11,275 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) [2021-06-12 20:00:11,892 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 100 [2021-06-12 20:00:12,056 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 20:00:12,391 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 107 [2021-06-12 20:00:12,647 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2021-06-12 20:00:12,932 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-12 20:00:13,156 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2021-06-12 20:00:13,403 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 110 [2021-06-12 20:00:13,689 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-12 20:00:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:13,811 INFO L93 Difference]: Finished difference Result 694 states and 2070 transitions. [2021-06-12 20:00:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:13,811 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 [2021-06-12 20:00:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:13,812 INFO L225 Difference]: With dead ends: 694 [2021-06-12 20:00:13,812 INFO L226 Difference]: Without dead ends: 676 [2021-06-12 20:00:13,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2357.1ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:00:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-12 20:00:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 408. [2021-06-12 20:00:13,818 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) [2021-06-12 20:00:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1321 transitions. [2021-06-12 20:00:13,818 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1321 transitions. Word has length 18 [2021-06-12 20:00:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:13,818 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1321 transitions. [2021-06-12 20:00:13,818 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) [2021-06-12 20:00:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1321 transitions. [2021-06-12 20:00:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:13,819 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:13,819 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:14,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6284 [2021-06-12 20:00:14,020 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1063228754, now seen corresponding path program 217 times [2021-06-12 20:00:14,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:14,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48844219] [2021-06-12 20:00:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:14,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48844219] [2021-06-12 20:00:14,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48844219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252686945] [2021-06-12 20:00:14,113 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 [2021-06-12 20:00:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:14,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:14,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,224 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 [2021-06-12 20:00:14,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:14,227 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 26 treesize of output 20 [2021-06-12 20:00:14,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,230 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 17 treesize of output 13 [2021-06-12 20:00:14,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:14,271 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-06-12 20:00:14,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:14,272 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-06-12 20:00:14,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:14,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:14,352 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 20:00:14,352 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:14,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:14,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 20:00:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252686945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:14,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:00:14,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226714550] [2021-06-12 20:00:14,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:14,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:14,372 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) [2021-06-12 20:00:14,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:14,732 INFO L93 Difference]: Finished difference Result 589 states and 1818 transitions. [2021-06-12 20:00:14,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:14,733 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 [2021-06-12 20:00:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:14,734 INFO L225 Difference]: With dead ends: 589 [2021-06-12 20:00:14,734 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 20:00:14,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 20:00:14,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 423. [2021-06-12 20:00:14,739 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) [2021-06-12 20:00:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1370 transitions. [2021-06-12 20:00:14,739 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1370 transitions. Word has length 18 [2021-06-12 20:00:14,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:14,739 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1370 transitions. [2021-06-12 20:00:14,739 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) [2021-06-12 20:00:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1370 transitions. [2021-06-12 20:00:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:14,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:14,740 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:14,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6299 [2021-06-12 20:00:14,945 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash -876759992, now seen corresponding path program 218 times [2021-06-12 20:00:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:14,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364739285] [2021-06-12 20:00:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:15,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364739285] [2021-06-12 20:00:15,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364739285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186582278] [2021-06-12 20:00:15,038 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 [2021-06-12 20:00:15,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:15,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,150 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 27 treesize of output 21 [2021-06-12 20:00:15,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,153 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 [2021-06-12 20:00:15,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,156 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 [2021-06-12 20:00:15,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,198 INFO L628 ElimStorePlain]: treesize reduction 29, result has 68.8 percent of original size [2021-06-12 20:00:15,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:15,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:118, output treesize:64 [2021-06-12 20:00:15,244 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1637, array_0], 1=[v_prenex_1638, array_4]} [2021-06-12 20:00:15,246 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 15 treesize of output 11 [2021-06-12 20:00:15,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:15,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,287 INFO L628 ElimStorePlain]: treesize reduction 78, result has 38.6 percent of original size [2021-06-12 20:00:15,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:15,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:15,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:15,308 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1638 vanished before elimination [2021-06-12 20:00:15,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,310 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 11 treesize of output 3 [2021-06-12 20:00:15,311 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,313 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 21 treesize of output 7 [2021-06-12 20:00:15,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:15,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:15,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:15,337 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:141, output treesize:38 [2021-06-12 20:00:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186582278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:15,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:00:15,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583566846] [2021-06-12 20:00:15,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:00:15,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:15,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:00:15,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:00:15,401 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) [2021-06-12 20:00:15,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:15,794 INFO L93 Difference]: Finished difference Result 593 states and 1835 transitions. [2021-06-12 20:00:15,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:15,794 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 18 [2021-06-12 20:00:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:15,795 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:00:15,795 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:00:15,795 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:00:15,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 417. [2021-06-12 20:00:15,800 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) [2021-06-12 20:00:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1348 transitions. [2021-06-12 20:00:15,800 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1348 transitions. Word has length 18 [2021-06-12 20:00:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:15,800 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1348 transitions. [2021-06-12 20:00:15,800 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) [2021-06-12 20:00:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1348 transitions. [2021-06-12 20:00:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:15,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:15,801 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:16,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6308,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:16,002 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:16,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1750500672, now seen corresponding path program 219 times [2021-06-12 20:00:16,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:16,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027133501] [2021-06-12 20:00:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:16,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027133501] [2021-06-12 20:00:16,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027133501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130961852] [2021-06-12 20:00:16,094 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 [2021-06-12 20:00:16,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:16,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:16,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:16,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,248 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 25 treesize of output 19 [2021-06-12 20:00:16,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,251 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 15 treesize of output 11 [2021-06-12 20:00:16,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,279 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. [2021-06-12 20:00:16,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-12 20:00:16,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,346 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 17 treesize of output 13 [2021-06-12 20:00:16,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,350 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 15 treesize of output 11 [2021-06-12 20:00:16,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,401 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-12 20:00:16,401 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:16,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,404 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 27 treesize of output 21 [2021-06-12 20:00:16,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:16,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:16,430 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 21 treesize of output 7 [2021-06-12 20:00:16,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,433 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 11 treesize of output 3 [2021-06-12 20:00:16,433 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:16,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:16,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:16,462 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-12 20:00:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130961852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:16,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:16,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615956293] [2021-06-12 20:00:16,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:16,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:16,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:16,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:16,522 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) [2021-06-12 20:00:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:17,089 INFO L93 Difference]: Finished difference Result 604 states and 1871 transitions. [2021-06-12 20:00:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:17,090 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 [2021-06-12 20:00:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:17,091 INFO L225 Difference]: With dead ends: 604 [2021-06-12 20:00:17,091 INFO L226 Difference]: Without dead ends: 591 [2021-06-12 20:00:17,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 459.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:17,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-12 20:00:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 411. [2021-06-12 20:00:17,095 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) [2021-06-12 20:00:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1330 transitions. [2021-06-12 20:00:17,096 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1330 transitions. Word has length 18 [2021-06-12 20:00:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:17,096 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1330 transitions. [2021-06-12 20:00:17,096 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) [2021-06-12 20:00:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1330 transitions. [2021-06-12 20:00:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:17,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:17,096 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:17,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6318,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:17,297 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:17,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:17,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1973011818, now seen corresponding path program 220 times [2021-06-12 20:00:17,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:17,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915247101] [2021-06-12 20:00:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:17,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:17,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915247101] [2021-06-12 20:00:17,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915247101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312935064] [2021-06-12 20:00:17,391 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 [2021-06-12 20:00:17,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:17,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:17,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,531 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 15 treesize of output 11 [2021-06-12 20:00:17,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,534 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 [2021-06-12 20:00:17,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,551 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. [2021-06-12 20:00:17,551 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:64, output treesize:50 [2021-06-12 20:00:17,633 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 20:00:17,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,637 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 [2021-06-12 20:00:17,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,642 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 15 treesize of output 11 [2021-06-12 20:00:17,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:17,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,649 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 35 treesize of output 27 [2021-06-12 20:00:17,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:17,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,654 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 34 treesize of output 26 [2021-06-12 20:00:17,655 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,658 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 [2021-06-12 20:00:17,659 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,740 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-06-12 20:00:17,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,744 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 21 treesize of output 7 [2021-06-12 20:00:17,744 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,747 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 [2021-06-12 20:00:17,747 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:17,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:17,776 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-12 20:00:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312935064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:17,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:17,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445747898] [2021-06-12 20:00:17,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:17,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:17,835 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) [2021-06-12 20:00:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:18,442 INFO L93 Difference]: Finished difference Result 642 states and 1992 transitions. [2021-06-12 20:00:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:18,442 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 [2021-06-12 20:00:18,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:18,443 INFO L225 Difference]: With dead ends: 642 [2021-06-12 20:00:18,443 INFO L226 Difference]: Without dead ends: 634 [2021-06-12 20:00:18,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-06-12 20:00:18,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 402. [2021-06-12 20:00:18,448 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) [2021-06-12 20:00:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1297 transitions. [2021-06-12 20:00:18,448 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1297 transitions. Word has length 18 [2021-06-12 20:00:18,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:18,448 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1297 transitions. [2021-06-12 20:00:18,448 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) [2021-06-12 20:00:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1297 transitions. [2021-06-12 20:00:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:18,449 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:18,449 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:18,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6331,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:18,649 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:18,650 INFO L82 PathProgramCache]: Analyzing trace with hash -615142990, now seen corresponding path program 221 times [2021-06-12 20:00:18,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:18,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30823784] [2021-06-12 20:00:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:18,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:18,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30823784] [2021-06-12 20:00:18,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30823784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:18,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257396842] [2021-06-12 20:00:18,818 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 [2021-06-12 20:00:18,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:18,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:18,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,080 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 16 treesize of output 12 [2021-06-12 20:00:19,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,084 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 [2021-06-12 20:00:19,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,089 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 [2021-06-12 20:00:19,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,093 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 16 treesize of output 12 [2021-06-12 20:00:19,093 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,097 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 26 treesize of output 20 [2021-06-12 20:00:19,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,101 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 15 treesize of output 11 [2021-06-12 20:00:19,101 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,212 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 20:00:19,213 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 20:00:19,217 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. [2021-06-12 20:00:19,217 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 20:00:19,386 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1650], 1=[array_0, v_prenex_1649]} [2021-06-12 20:00:19,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:19,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:19,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:19,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,433 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-12 20:00:19,435 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 7 treesize of output 5 [2021-06-12 20:00:19,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,453 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 [2021-06-12 20:00:19,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,456 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 [2021-06-12 20:00:19,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:19,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1649 vanished before elimination [2021-06-12 20:00:19,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:19,478 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 20:00:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257396842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:19,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:19,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191298932] [2021-06-12 20:00:19,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:19,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:19,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:19,502 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) [2021-06-12 20:00:20,214 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-12 20:00:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:20,821 INFO L93 Difference]: Finished difference Result 581 states and 1782 transitions. [2021-06-12 20:00:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:20,822 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 [2021-06-12 20:00:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:20,823 INFO L225 Difference]: With dead ends: 581 [2021-06-12 20:00:20,823 INFO L226 Difference]: Without dead ends: 569 [2021-06-12 20:00:20,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1304.1ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-12 20:00:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 408. [2021-06-12 20:00:20,827 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) [2021-06-12 20:00:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1312 transitions. [2021-06-12 20:00:20,828 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1312 transitions. Word has length 18 [2021-06-12 20:00:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:20,828 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1312 transitions. [2021-06-12 20:00:20,828 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) [2021-06-12 20:00:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1312 transitions. [2021-06-12 20:00:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:20,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:20,828 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:21,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6342 [2021-06-12 20:00:21,030 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:21,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash 866094880, now seen corresponding path program 222 times [2021-06-12 20:00:21,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:21,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806650017] [2021-06-12 20:00:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:21,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806650017] [2021-06-12 20:00:21,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806650017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097399435] [2021-06-12 20:00:21,322 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 [2021-06-12 20:00:21,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:21,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:21,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,574 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 16 treesize of output 12 [2021-06-12 20:00:21,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,578 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 15 treesize of output 11 [2021-06-12 20:00:21,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,582 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 25 treesize of output 19 [2021-06-12 20:00:21,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,587 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 15 treesize of output 11 [2021-06-12 20:00:21,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,591 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 26 treesize of output 20 [2021-06-12 20:00:21,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,595 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 16 treesize of output 12 [2021-06-12 20:00:21,595 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,716 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-12 20:00:21,716 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 20:00:21,720 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. [2021-06-12 20:00:21,721 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:211, output treesize:143 [2021-06-12 20:00:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,847 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 15 treesize of output 11 [2021-06-12 20:00:21,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,851 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:21,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,907 INFO L628 ElimStorePlain]: treesize reduction 77, result has 50.0 percent of original size [2021-06-12 20:00:21,910 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 [2021-06-12 20:00:21,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:21,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,939 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 7 treesize of output 5 [2021-06-12 20:00:21,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:21,964 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1660 vanished before elimination [2021-06-12 20:00:21,964 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:21,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,967 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 11 treesize of output 3 [2021-06-12 20:00:21,968 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,970 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 21 treesize of output 7 [2021-06-12 20:00:21,971 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:22,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:22,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:22,002 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:192, output treesize:41 [2021-06-12 20:00:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097399435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:22,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:22,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746005962] [2021-06-12 20:00:22,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:22,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:22,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:22,065 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) [2021-06-12 20:00:22,775 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-06-12 20:00:23,034 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 20:00:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:23,407 INFO L93 Difference]: Finished difference Result 592 states and 1804 transitions. [2021-06-12 20:00:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:23,408 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 [2021-06-12 20:00:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:23,409 INFO L225 Difference]: With dead ends: 592 [2021-06-12 20:00:23,409 INFO L226 Difference]: Without dead ends: 578 [2021-06-12 20:00:23,409 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1432.1ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:23,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-12 20:00:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 409. [2021-06-12 20:00:23,413 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) [2021-06-12 20:00:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1322 transitions. [2021-06-12 20:00:23,414 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1322 transitions. Word has length 18 [2021-06-12 20:00:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:23,414 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1322 transitions. [2021-06-12 20:00:23,414 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) [2021-06-12 20:00:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1322 transitions. [2021-06-12 20:00:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:23,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:23,415 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:23,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6362 [2021-06-12 20:00:23,616 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash -450062424, now seen corresponding path program 223 times [2021-06-12 20:00:23,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:23,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920748542] [2021-06-12 20:00:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:23,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:23,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920748542] [2021-06-12 20:00:23,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920748542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991390051] [2021-06-12 20:00:23,774 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 [2021-06-12 20:00:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:23,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,055 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 17 treesize of output 13 [2021-06-12 20:00:24,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,059 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 15 treesize of output 11 [2021-06-12 20:00:24,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,118 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 [2021-06-12 20:00:24,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,122 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 [2021-06-12 20:00:24,123 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,177 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 25 treesize of output 19 [2021-06-12 20:00:24,178 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,181 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 27 treesize of output 21 [2021-06-12 20:00:24,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:24,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,240 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. [2021-06-12 20:00:24,240 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:187, output treesize:163 [2021-06-12 20:00:24,400 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 20:00:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,405 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 17 treesize of output 13 [2021-06-12 20:00:24,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,409 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 25 treesize of output 19 [2021-06-12 20:00:24,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,414 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 26 treesize of output 20 [2021-06-12 20:00:24,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,419 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 19 treesize of output 15 [2021-06-12 20:00:24,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,424 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 [2021-06-12 20:00:24,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,428 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 15 treesize of output 11 [2021-06-12 20:00:24,429 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,433 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 28 treesize of output 22 [2021-06-12 20:00:24,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,438 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 16 [2021-06-12 20:00:24,439 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,443 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 16 treesize of output 12 [2021-06-12 20:00:24,443 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,447 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 16 treesize of output 12 [2021-06-12 20:00:24,448 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,452 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 29 treesize of output 23 [2021-06-12 20:00:24,453 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,456 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 18 treesize of output 14 [2021-06-12 20:00:24,457 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,594 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-12 20:00:24,594 INFO L628 ElimStorePlain]: treesize reduction 109, result has 57.1 percent of original size [2021-06-12 20:00:24,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,598 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 21 treesize of output 7 [2021-06-12 20:00:24,599 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:00:24,603 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,606 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 [2021-06-12 20:00:24,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:24,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 20:00:24,658 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:399, output treesize:64 [2021-06-12 20:00:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:24,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991390051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:24,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:24,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707677140] [2021-06-12 20:00:24,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:24,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:24,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:24,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:24,739 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) [2021-06-12 20:00:25,406 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 93 [2021-06-12 20:00:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:25,645 INFO L93 Difference]: Finished difference Result 577 states and 1789 transitions. [2021-06-12 20:00:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:25,645 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 [2021-06-12 20:00:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:25,646 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:00:25,646 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 20:00:25,646 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1066.7ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:00:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 20:00:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 407. [2021-06-12 20:00:25,651 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) [2021-06-12 20:00:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1317 transitions. [2021-06-12 20:00:25,651 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1317 transitions. Word has length 18 [2021-06-12 20:00:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:25,651 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1317 transitions. [2021-06-12 20:00:25,651 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) [2021-06-12 20:00:25,651 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1317 transitions. [2021-06-12 20:00:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:25,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:25,652 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:25,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6384 [2021-06-12 20:00:25,876 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:25,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:25,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1931932108, now seen corresponding path program 224 times [2021-06-12 20:00:25,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:25,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204339797] [2021-06-12 20:00:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204339797] [2021-06-12 20:00:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204339797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538809119] [2021-06-12 20:00:26,001 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 [2021-06-12 20:00:26,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:26,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:26,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,150 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 25 treesize of output 19 [2021-06-12 20:00:26,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,159 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 15 treesize of output 11 [2021-06-12 20:00:26,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,163 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 24 treesize of output 18 [2021-06-12 20:00:26,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,217 INFO L628 ElimStorePlain]: treesize reduction 39, result has 64.2 percent of original size [2021-06-12 20:00:26,219 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. [2021-06-12 20:00:26,219 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:130, output treesize:70 [2021-06-12 20:00:26,334 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1672], 1=[array_0, v_prenex_1671]} [2021-06-12 20:00:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:26,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,340 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 15 treesize of output 11 [2021-06-12 20:00:26,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,371 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 20:00:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:26,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:26,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,388 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:00:26,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,391 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 21 treesize of output 7 [2021-06-12 20:00:26,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,394 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 11 treesize of output 3 [2021-06-12 20:00:26,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:26,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:26,414 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:00:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538809119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:26,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:26,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243090915] [2021-06-12 20:00:26,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:26,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:26,437 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) [2021-06-12 20:00:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:26,905 INFO L93 Difference]: Finished difference Result 575 states and 1776 transitions. [2021-06-12 20:00:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:26,905 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 [2021-06-12 20:00:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:26,906 INFO L225 Difference]: With dead ends: 575 [2021-06-12 20:00:26,906 INFO L226 Difference]: Without dead ends: 559 [2021-06-12 20:00:26,906 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-06-12 20:00:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 403. [2021-06-12 20:00:26,911 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) [2021-06-12 20:00:26,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1306 transitions. [2021-06-12 20:00:26,912 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1306 transitions. Word has length 18 [2021-06-12 20:00:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:26,912 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1306 transitions. [2021-06-12 20:00:26,912 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) [2021-06-12 20:00:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1306 transitions. [2021-06-12 20:00:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:26,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:26,913 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:27,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6413,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:27,125 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -881797318, now seen corresponding path program 225 times [2021-06-12 20:00:27,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:27,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362862458] [2021-06-12 20:00:27,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:27,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362862458] [2021-06-12 20:00:27,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362862458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47528814] [2021-06-12 20:00:27,224 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 [2021-06-12 20:00:27,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:27,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:27,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,372 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 15 treesize of output 11 [2021-06-12 20:00:27,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:00:27,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,402 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. [2021-06-12 20:00:27,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:79, output treesize:65 [2021-06-12 20:00:27,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,466 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 [2021-06-12 20:00:27,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,470 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 [2021-06-12 20:00:27,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,520 INFO L628 ElimStorePlain]: treesize reduction 74, result has 45.2 percent of original size [2021-06-12 20:00:27,521 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:27,523 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 [2021-06-12 20:00:27,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:27,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,550 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 [2021-06-12 20:00:27,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,553 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 11 treesize of output 3 [2021-06-12 20:00:27,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:27,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:27,583 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:149, output treesize:38 [2021-06-12 20:00:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47528814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:27,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054996] [2021-06-12 20:00:27,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:27,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:27,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:27,647 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) [2021-06-12 20:00:28,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:28,182 INFO L93 Difference]: Finished difference Result 555 states and 1722 transitions. [2021-06-12 20:00:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:00:28,183 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 [2021-06-12 20:00:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:28,184 INFO L225 Difference]: With dead ends: 555 [2021-06-12 20:00:28,184 INFO L226 Difference]: Without dead ends: 542 [2021-06-12 20:00:28,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-12 20:00:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 387. [2021-06-12 20:00:28,188 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) [2021-06-12 20:00:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1252 transitions. [2021-06-12 20:00:28,188 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1252 transitions. Word has length 18 [2021-06-12 20:00:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:28,188 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1252 transitions. [2021-06-12 20:00:28,188 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) [2021-06-12 20:00:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1252 transitions. [2021-06-12 20:00:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:28,189 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:28,189 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:28,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6429 [2021-06-12 20:00:28,389 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:28,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:28,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1014303434, now seen corresponding path program 226 times [2021-06-12 20:00:28,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:28,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882007334] [2021-06-12 20:00:28,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882007334] [2021-06-12 20:00:28,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882007334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440300185] [2021-06-12 20:00:28,548 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 [2021-06-12 20:00:28,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:28,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:28,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:28,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,678 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 15 treesize of output 11 [2021-06-12 20:00:28,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,682 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 34 treesize of output 26 [2021-06-12 20:00:28,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,686 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 [2021-06-12 20:00:28,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,690 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 [2021-06-12 20:00:28,691 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,694 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 35 treesize of output 27 [2021-06-12 20:00:28,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:28,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,699 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 [2021-06-12 20:00:28,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,810 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 20:00:28,811 INFO L628 ElimStorePlain]: treesize reduction 59, result has 78.0 percent of original size [2021-06-12 20:00:28,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:28,812 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-06-12 20:00:29,124 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-12 20:00:29,261 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_0]} [2021-06-12 20:00:29,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,266 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 [2021-06-12 20:00:29,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,272 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 27 treesize of output 21 [2021-06-12 20:00:29,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,278 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 26 treesize of output 20 [2021-06-12 20:00:29,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,283 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 [2021-06-12 20:00:29,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,288 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 28 treesize of output 22 [2021-06-12 20:00:29,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,294 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 27 treesize of output 21 [2021-06-12 20:00:29,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,299 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 26 treesize of output 20 [2021-06-12 20:00:29,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,304 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 25 treesize of output 19 [2021-06-12 20:00:29,305 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,310 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 15 treesize of output 11 [2021-06-12 20:00:29,311 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,315 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 16 treesize of output 12 [2021-06-12 20:00:29,315 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,320 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 28 treesize of output 22 [2021-06-12 20:00:29,320 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:29,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,325 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 [2021-06-12 20:00:29,326 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,331 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 15 treesize of output 11 [2021-06-12 20:00:29,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,336 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 16 treesize of output 12 [2021-06-12 20:00:29,336 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,484 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-12 20:00:29,485 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 20:00:29,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,489 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 20 treesize of output 9 [2021-06-12 20:00:29,490 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:29,493 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 20 treesize of output 9 [2021-06-12 20:00:29,494 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:29,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:29,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:00:29,559 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 20:00:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440300185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:29,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:29,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086151486] [2021-06-12 20:00:29,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:29,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:29,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:29,644 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) [2021-06-12 20:00:30,162 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 20:00:30,567 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2021-06-12 20:00:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:31,206 INFO L93 Difference]: Finished difference Result 571 states and 1741 transitions. [2021-06-12 20:00:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:31,207 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 [2021-06-12 20:00:31,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:31,207 INFO L225 Difference]: With dead ends: 571 [2021-06-12 20:00:31,208 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 20:00:31,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1706.2ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:00:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 20:00:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 386. [2021-06-12 20:00:31,212 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) [2021-06-12 20:00:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1244 transitions. [2021-06-12 20:00:31,213 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1244 transitions. Word has length 18 [2021-06-12 20:00:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:31,213 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1244 transitions. [2021-06-12 20:00:31,213 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) [2021-06-12 20:00:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1244 transitions. [2021-06-12 20:00:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:31,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:31,213 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:31,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6442,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:31,427 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1851708756, now seen corresponding path program 227 times [2021-06-12 20:00:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:31,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389630677] [2021-06-12 20:00:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389630677] [2021-06-12 20:00:31,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389630677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744165625] [2021-06-12 20:00:31,641 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 [2021-06-12 20:00:31,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:31,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:31,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:31,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,804 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 26 treesize of output 20 [2021-06-12 20:00:31,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,808 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 25 treesize of output 19 [2021-06-12 20:00:31,809 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,812 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 [2021-06-12 20:00:31,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,815 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 16 treesize of output 12 [2021-06-12 20:00:31,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,891 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-12 20:00:31,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:31,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-12 20:00:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,120 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 17 treesize of output 13 [2021-06-12 20:00:32,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,124 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 [2021-06-12 20:00:32,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,187 INFO L628 ElimStorePlain]: treesize reduction 104, result has 43.5 percent of original size [2021-06-12 20:00:32,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,190 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 27 treesize of output 21 [2021-06-12 20:00:32,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:32,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,217 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:32,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:32,220 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 [2021-06-12 20:00:32,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,224 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 11 treesize of output 3 [2021-06-12 20:00:32,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:32,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:32,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:32,283 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1689 vanished before elimination [2021-06-12 20:00:32,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:32,284 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:198, output treesize:46 [2021-06-12 20:00:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:32,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744165625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:32,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:32,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:32,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267794162] [2021-06-12 20:00:32,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:32,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:32,375 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) [2021-06-12 20:00:32,854 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-06-12 20:00:33,048 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:00:33,299 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 20:00:33,684 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-12 20:00:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:33,860 INFO L93 Difference]: Finished difference Result 542 states and 1658 transitions. [2021-06-12 20:00:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:00:33,861 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 [2021-06-12 20:00:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:33,861 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:00:33,861 INFO L226 Difference]: Without dead ends: 526 [2021-06-12 20:00:33,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1541.5ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-06-12 20:00:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 385. [2021-06-12 20:00:33,866 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) [2021-06-12 20:00:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1243 transitions. [2021-06-12 20:00:33,866 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1243 transitions. Word has length 18 [2021-06-12 20:00:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:33,866 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1243 transitions. [2021-06-12 20:00:33,866 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) [2021-06-12 20:00:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1243 transitions. [2021-06-12 20:00:33,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:33,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:33,867 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:34,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6475 [2021-06-12 20:00:34,067 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash -332880908, now seen corresponding path program 228 times [2021-06-12 20:00:34,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:34,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180211877] [2021-06-12 20:00:34,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:34,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180211877] [2021-06-12 20:00:34,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180211877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488973497] [2021-06-12 20:00:34,221 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 [2021-06-12 20:00:34,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:34,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,334 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 25 treesize of output 19 [2021-06-12 20:00:34,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,338 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 [2021-06-12 20:00:34,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,342 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 26 treesize of output 20 [2021-06-12 20:00:34,343 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,346 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 16 treesize of output 12 [2021-06-12 20:00:34,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,350 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 [2021-06-12 20:00:34,351 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,354 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 [2021-06-12 20:00:34,355 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,442 INFO L628 ElimStorePlain]: treesize reduction 68, result has 62.4 percent of original size [2021-06-12 20:00:34,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:34,443 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 20:00:34,678 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1697], 1=[array_0, v_prenex_1696]} [2021-06-12 20:00:34,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:34,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,683 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 15 treesize of output 11 [2021-06-12 20:00:34,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,714 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 20:00:34,716 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 27 treesize of output 21 [2021-06-12 20:00:34,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:34,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,733 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:00:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,735 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 11 treesize of output 3 [2021-06-12 20:00:34,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,738 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 21 treesize of output 7 [2021-06-12 20:00:34,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:34,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:34,759 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:00:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488973497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:34,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:34,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29133139] [2021-06-12 20:00:34,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:34,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:34,781 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) [2021-06-12 20:00:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:35,350 INFO L93 Difference]: Finished difference Result 530 states and 1636 transitions. [2021-06-12 20:00:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:35,350 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 [2021-06-12 20:00:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:35,351 INFO L225 Difference]: With dead ends: 530 [2021-06-12 20:00:35,351 INFO L226 Difference]: Without dead ends: 525 [2021-06-12 20:00:35,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 668.9ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-12 20:00:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 388. [2021-06-12 20:00:35,355 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) [2021-06-12 20:00:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1255 transitions. [2021-06-12 20:00:35,355 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1255 transitions. Word has length 18 [2021-06-12 20:00:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:35,356 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1255 transitions. [2021-06-12 20:00:35,356 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) [2021-06-12 20:00:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1255 transitions. [2021-06-12 20:00:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:35,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:35,356 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:35,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6492 [2021-06-12 20:00:35,557 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2022097642, now seen corresponding path program 229 times [2021-06-12 20:00:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:35,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544556936] [2021-06-12 20:00:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:35,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544556936] [2021-06-12 20:00:35,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544556936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955704904] [2021-06-12 20:00:35,702 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 [2021-06-12 20:00:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:35,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:35,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,815 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 [2021-06-12 20:00:35,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,820 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 24 treesize of output 18 [2021-06-12 20:00:35,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,823 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 26 treesize of output 20 [2021-06-12 20:00:35,824 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,828 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 16 treesize of output 12 [2021-06-12 20:00:35,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,832 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 25 treesize of output 19 [2021-06-12 20:00:35,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:35,836 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 15 treesize of output 11 [2021-06-12 20:00:35,836 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:35,924 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-12 20:00:35,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:35,925 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 20:00:36,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,116 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 35 treesize of output 27 [2021-06-12 20:00:36,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:36,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,121 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 [2021-06-12 20:00:36,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,184 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-06-12 20:00:36,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,187 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 [2021-06-12 20:00:36,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,190 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 21 treesize of output 7 [2021-06-12 20:00:36,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:36,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:36,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1700 vanished before elimination [2021-06-12 20:00:36,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:36,244 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-06-12 20:00:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:36,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955704904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:36,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939397348] [2021-06-12 20:00:36,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:36,301 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) [2021-06-12 20:00:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:36,724 INFO L93 Difference]: Finished difference Result 551 states and 1687 transitions. [2021-06-12 20:00:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:36,725 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 [2021-06-12 20:00:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:36,726 INFO L225 Difference]: With dead ends: 551 [2021-06-12 20:00:36,726 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:00:36,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 506.9ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:00:36,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:00:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 385. [2021-06-12 20:00:36,730 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) [2021-06-12 20:00:36,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1243 transitions. [2021-06-12 20:00:36,731 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1243 transitions. Word has length 18 [2021-06-12 20:00:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:36,731 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1243 transitions. [2021-06-12 20:00:36,731 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) [2021-06-12 20:00:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1243 transitions. [2021-06-12 20:00:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:36,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:36,731 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:36,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6510 [2021-06-12 20:00:36,932 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:36,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:36,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1074314582, now seen corresponding path program 230 times [2021-06-12 20:00:36,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:36,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560024969] [2021-06-12 20:00:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560024969] [2021-06-12 20:00:37,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560024969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668255332] [2021-06-12 20:00:37,106 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 [2021-06-12 20:00:37,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:37,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:37,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:37,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:37,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,220 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 17 treesize of output 13 [2021-06-12 20:00:37,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,224 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 18 treesize of output 14 [2021-06-12 20:00:37,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,227 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 15 treesize of output 11 [2021-06-12 20:00:37,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:37,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,273 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-12 20:00:37,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:37,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-12 20:00:37,461 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 20:00:37,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,465 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 [2021-06-12 20:00:37,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:37,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,469 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 15 treesize of output 11 [2021-06-12 20:00:37,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,473 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 25 treesize of output 19 [2021-06-12 20:00:37,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,476 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 17 treesize of output 13 [2021-06-12 20:00:37,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,545 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 20:00:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,549 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 21 treesize of output 7 [2021-06-12 20:00:37,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-12 20:00:37,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:37,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,562 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 [2021-06-12 20:00:37,563 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:37,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:37,594 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-06-12 20:00:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668255332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:37,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:37,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62771575] [2021-06-12 20:00:37,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:37,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:37,670 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) [2021-06-12 20:00:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:38,360 INFO L93 Difference]: Finished difference Result 540 states and 1665 transitions. [2021-06-12 20:00:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:38,360 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 [2021-06-12 20:00:38,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:38,361 INFO L225 Difference]: With dead ends: 540 [2021-06-12 20:00:38,361 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 20:00:38,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 783.4ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 20:00:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 386. [2021-06-12 20:00:38,365 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) [2021-06-12 20:00:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1245 transitions. [2021-06-12 20:00:38,365 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1245 transitions. Word has length 18 [2021-06-12 20:00:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:38,366 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1245 transitions. [2021-06-12 20:00:38,366 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) [2021-06-12 20:00:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1245 transitions. [2021-06-12 20:00:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:38,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:38,366 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:38,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6528 [2021-06-12 20:00:38,567 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:38,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1147687062, now seen corresponding path program 231 times [2021-06-12 20:00:38,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:38,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884485184] [2021-06-12 20:00:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:38,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884485184] [2021-06-12 20:00:38,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884485184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756464624] [2021-06-12 20:00:38,749 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 [2021-06-12 20:00:38,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:00:38,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:38,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:38,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,866 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 17 treesize of output 13 [2021-06-12 20:00:38,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,870 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 18 treesize of output 14 [2021-06-12 20:00:38,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,874 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 15 treesize of output 11 [2021-06-12 20:00:38,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:38,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,918 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-12 20:00:38,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:38,919 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-12 20:00:38,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,974 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 17 treesize of output 13 [2021-06-12 20:00:38,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,978 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 25 treesize of output 19 [2021-06-12 20:00:38,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:38,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,985 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 18 treesize of output 14 [2021-06-12 20:00:38,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,989 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 [2021-06-12 20:00:38,990 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,992 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 27 treesize of output 21 [2021-06-12 20:00:38,993 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:39,050 INFO L628 ElimStorePlain]: treesize reduction 79, result has 49.7 percent of original size [2021-06-12 20:00:39,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:39,053 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 21 treesize of output 7 [2021-06-12 20:00:39,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,055 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 11 treesize of output 3 [2021-06-12 20:00:39,056 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:39,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:39,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:39,088 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-12 20:00:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756464624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:39,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:39,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837350303] [2021-06-12 20:00:39,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:39,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:39,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:39,191 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) [2021-06-12 20:00:39,638 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-06-12 20:00:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:40,048 INFO L93 Difference]: Finished difference Result 551 states and 1681 transitions. [2021-06-12 20:00:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:40,048 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 [2021-06-12 20:00:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:40,049 INFO L225 Difference]: With dead ends: 551 [2021-06-12 20:00:40,049 INFO L226 Difference]: Without dead ends: 540 [2021-06-12 20:00:40,049 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 837.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-12 20:00:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 386. [2021-06-12 20:00:40,053 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) [2021-06-12 20:00:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1246 transitions. [2021-06-12 20:00:40,054 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1246 transitions. Word has length 18 [2021-06-12 20:00:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:40,054 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1246 transitions. [2021-06-12 20:00:40,054 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) [2021-06-12 20:00:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1246 transitions. [2021-06-12 20:00:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:40,054 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:40,054 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:40,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6541 [2021-06-12 20:00:40,255 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash 843016612, now seen corresponding path program 232 times [2021-06-12 20:00:40,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:40,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700513029] [2021-06-12 20:00:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:40,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700513029] [2021-06-12 20:00:40,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700513029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464116530] [2021-06-12 20:00:40,461 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 [2021-06-12 20:00:40,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:40,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:40,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:40,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,590 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 15 treesize of output 11 [2021-06-12 20:00:40,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,594 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 34 treesize of output 26 [2021-06-12 20:00:40,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,599 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 24 treesize of output 18 [2021-06-12 20:00:40,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:00:40,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,607 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 35 treesize of output 27 [2021-06-12 20:00:40,608 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:40,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,611 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 25 treesize of output 19 [2021-06-12 20:00:40,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,728 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-06-12 20:00:40,729 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.3 percent of original size [2021-06-12 20:00:40,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:40,730 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:238, output treesize:209 [2021-06-12 20:00:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,836 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 46 treesize of output 36 [2021-06-12 20:00:40,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,841 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 27 treesize of output 21 [2021-06-12 20:00:40,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:40,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,849 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 15 treesize of output 11 [2021-06-12 20:00:40,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,854 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 [2021-06-12 20:00:40,855 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:40,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,862 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 16 treesize of output 12 [2021-06-12 20:00:40,863 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:40,866 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:40,869 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,873 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 25 treesize of output 19 [2021-06-12 20:00:40,874 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,878 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 27 treesize of output 21 [2021-06-12 20:00:40,879 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,882 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 [2021-06-12 20:00:40,883 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,887 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 45 treesize of output 35 [2021-06-12 20:00:40,888 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,891 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 [2021-06-12 20:00:40,892 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,972 INFO L628 ElimStorePlain]: treesize reduction 213, result has 29.5 percent of original size [2021-06-12 20:00:40,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,975 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 20 treesize of output 9 [2021-06-12 20:00:40,975 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,977 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 [2021-06-12 20:00:40,978 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:41,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:41,004 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:599, output treesize:67 [2021-06-12 20:00:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464116530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:41,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:41,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785270220] [2021-06-12 20:00:41,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:41,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:41,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:41,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:41,134 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) [2021-06-12 20:00:41,629 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 20:00:42,183 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-12 20:00:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:42,429 INFO L93 Difference]: Finished difference Result 580 states and 1777 transitions. [2021-06-12 20:00:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:42,430 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 [2021-06-12 20:00:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:42,431 INFO L225 Difference]: With dead ends: 580 [2021-06-12 20:00:42,431 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 20:00:42,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1342.0ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:00:42,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 20:00:42,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 384. [2021-06-12 20:00:42,435 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) [2021-06-12 20:00:42,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1241 transitions. [2021-06-12 20:00:42,435 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1241 transitions. Word has length 18 [2021-06-12 20:00:42,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:42,435 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1241 transitions. [2021-06-12 20:00:42,435 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) [2021-06-12 20:00:42,435 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1241 transitions. [2021-06-12 20:00:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:42,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:42,436 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:42,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6554 [2021-06-12 20:00:42,636 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 325764, now seen corresponding path program 233 times [2021-06-12 20:00:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:42,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004109545] [2021-06-12 20:00:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:42,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:42,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004109545] [2021-06-12 20:00:42,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004109545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:42,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858974460] [2021-06-12 20:00:42,847 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 [2021-06-12 20:00:42,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:42,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:42,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,963 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 25 treesize of output 19 [2021-06-12 20:00:42,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,967 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 24 treesize of output 18 [2021-06-12 20:00:42,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,971 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 26 treesize of output 20 [2021-06-12 20:00:42,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,975 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 16 treesize of output 12 [2021-06-12 20:00:42,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,979 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 [2021-06-12 20:00:42,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:42,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:42,982 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 15 treesize of output 11 [2021-06-12 20:00:42,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,066 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-12 20:00:43,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:43,067 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 20:00:43,144 INFO L446 ElimStorePlain]: Different costs {0=[array_0, array_4], 1=[v_prenex_1714, v_prenex_1713, v_prenex_1709, v_prenex_1710, v_prenex_1712, v_prenex_1711]} [2021-06-12 20:00:43,147 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 18 treesize of output 14 [2021-06-12 20:00:43,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,231 INFO L628 ElimStorePlain]: treesize reduction 149, result has 41.1 percent of original size [2021-06-12 20:00:43,231 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:43,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:00:43,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,272 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1713 vanished before elimination [2021-06-12 20:00:43,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,274 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 [2021-06-12 20:00:43,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:43,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,313 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 11 treesize of output 3 [2021-06-12 20:00:43,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,316 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 [2021-06-12 20:00:43,316 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:43,358 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 18 treesize of output 14 [2021-06-12 20:00:43,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,408 INFO L628 ElimStorePlain]: treesize reduction 14, result has 79.7 percent of original size [2021-06-12 20:00:43,409 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1711 vanished before elimination [2021-06-12 20:00:43,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:43,409 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:270, output treesize:55 [2021-06-12 20:00:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858974460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:43,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:43,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487163525] [2021-06-12 20:00:43,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:43,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:43,523 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) [2021-06-12 20:00:43,886 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-12 20:00:44,176 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-12 20:00:44,461 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-12 20:00:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:44,554 INFO L93 Difference]: Finished difference Result 557 states and 1706 transitions. [2021-06-12 20:00:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:00:44,554 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 [2021-06-12 20:00:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:44,555 INFO L225 Difference]: With dead ends: 557 [2021-06-12 20:00:44,555 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 20:00:44,555 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1073.2ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:00:44,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 20:00:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 381. [2021-06-12 20:00:44,560 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) [2021-06-12 20:00:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1227 transitions. [2021-06-12 20:00:44,560 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1227 transitions. Word has length 18 [2021-06-12 20:00:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:44,560 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 1227 transitions. [2021-06-12 20:00:44,560 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) [2021-06-12 20:00:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1227 transitions. [2021-06-12 20:00:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:44,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:44,561 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:44,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6575 [2021-06-12 20:00:44,761 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1454877628, now seen corresponding path program 234 times [2021-06-12 20:00:44,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:44,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444152394] [2021-06-12 20:00:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:44,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:44,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:44,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444152394] [2021-06-12 20:00:44,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444152394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:44,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834901953] [2021-06-12 20:00:44,929 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 [2021-06-12 20:00:44,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:00:44,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:45,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,070 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 27 treesize of output 21 [2021-06-12 20:00:45,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:45,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,074 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 17 treesize of output 13 [2021-06-12 20:00:45,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,078 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 25 treesize of output 19 [2021-06-12 20:00:45,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,081 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 [2021-06-12 20:00:45,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:45,120 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-12 20:00:45,460 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-12 20:00:45,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,464 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 26 treesize of output 20 [2021-06-12 20:00:45,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,469 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 16 treesize of output 12 [2021-06-12 20:00:45,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,474 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 29 treesize of output 23 [2021-06-12 20:00:45,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,479 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 [2021-06-12 20:00:45,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,483 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 20 treesize of output 16 [2021-06-12 20:00:45,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,488 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 28 treesize of output 22 [2021-06-12 20:00:45,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,493 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 17 treesize of output 13 [2021-06-12 20:00:45,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,498 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 25 treesize of output 19 [2021-06-12 20:00:45,498 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,502 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 16 treesize of output 12 [2021-06-12 20:00:45,503 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,507 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 19 treesize of output 15 [2021-06-12 20:00:45,508 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,512 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 15 treesize of output 11 [2021-06-12 20:00:45,513 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,516 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 18 treesize of output 14 [2021-06-12 20:00:45,517 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,664 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-06-12 20:00:45,664 INFO L628 ElimStorePlain]: treesize reduction 98, result has 62.3 percent of original size [2021-06-12 20:00:45,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,669 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 11 treesize of output 3 [2021-06-12 20:00:45,669 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,673 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 21 treesize of output 7 [2021-06-12 20:00:45,674 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,677 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 9 treesize of output 3 [2021-06-12 20:00:45,678 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:45,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:00:45,738 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:405, output treesize:77 [2021-06-12 20:00:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834901953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:45,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:45,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443388977] [2021-06-12 20:00:45,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:45,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:45,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:45,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:45,840 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) [2021-06-12 20:00:46,335 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 20:00:46,562 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 98 [2021-06-12 20:00:46,800 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-12 20:00:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:47,214 INFO L93 Difference]: Finished difference Result 560 states and 1699 transitions. [2021-06-12 20:00:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:47,215 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 [2021-06-12 20:00:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:47,215 INFO L225 Difference]: With dead ends: 560 [2021-06-12 20:00:47,215 INFO L226 Difference]: Without dead ends: 544 [2021-06-12 20:00:47,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1449.0ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-06-12 20:00:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 385. [2021-06-12 20:00:47,220 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) [2021-06-12 20:00:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1233 transitions. [2021-06-12 20:00:47,220 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1233 transitions. Word has length 18 [2021-06-12 20:00:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:47,220 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 1233 transitions. [2021-06-12 20:00:47,220 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) [2021-06-12 20:00:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1233 transitions. [2021-06-12 20:00:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:47,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:47,221 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:47,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6592,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:47,421 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2095137096, now seen corresponding path program 235 times [2021-06-12 20:00:47,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:47,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687421613] [2021-06-12 20:00:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:47,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:47,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687421613] [2021-06-12 20:00:47,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687421613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581993014] [2021-06-12 20:00:47,626 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 [2021-06-12 20:00:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:47,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,762 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 24 treesize of output 18 [2021-06-12 20:00:47,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,766 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 [2021-06-12 20:00:47,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,770 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 [2021-06-12 20:00:47,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,779 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 26 treesize of output 20 [2021-06-12 20:00:47,780 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,784 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 16 treesize of output 12 [2021-06-12 20:00:47,784 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,787 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 15 treesize of output 11 [2021-06-12 20:00:47,788 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,871 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-12 20:00:47,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:47,873 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 20:00:48,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,124 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 [2021-06-12 20:00:48,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,128 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 [2021-06-12 20:00:48,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,189 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-12 20:00:48,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,193 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 [2021-06-12 20:00:48,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:48,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:48,222 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 10 treesize of output 5 [2021-06-12 20:00:48,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,225 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 20 treesize of output 9 [2021-06-12 20:00:48,226 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,258 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1730 vanished before elimination [2021-06-12 20:00:48,260 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 [2021-06-12 20:00:48,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:48,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:48,284 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1731 vanished before elimination [2021-06-12 20:00:48,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:48,286 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 20:00:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:48,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581993014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:48,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:48,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:48,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499684244] [2021-06-12 20:00:48,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:48,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:48,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:48,373 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) [2021-06-12 20:00:48,901 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-12 20:00:49,246 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-12 20:00:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:49,762 INFO L93 Difference]: Finished difference Result 602 states and 1813 transitions. [2021-06-12 20:00:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:00:49,762 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 [2021-06-12 20:00:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:49,763 INFO L225 Difference]: With dead ends: 602 [2021-06-12 20:00:49,763 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 20:00:49,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1527.5ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 20:00:49,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 390. [2021-06-12 20:00:49,767 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) [2021-06-12 20:00:49,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1263 transitions. [2021-06-12 20:00:49,768 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1263 transitions. Word has length 18 [2021-06-12 20:00:49,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:49,768 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1263 transitions. [2021-06-12 20:00:49,768 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) [2021-06-12 20:00:49,768 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1263 transitions. [2021-06-12 20:00:49,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:49,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:49,768 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:49,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6610,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:49,969 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash -125787926, now seen corresponding path program 236 times [2021-06-12 20:00:49,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:49,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286145243] [2021-06-12 20:00:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:50,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286145243] [2021-06-12 20:00:50,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286145243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85256254] [2021-06-12 20:00:50,097 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 [2021-06-12 20:00:50,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:50,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:50,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,209 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 16 treesize of output 12 [2021-06-12 20:00:50,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,212 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 [2021-06-12 20:00:50,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,216 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 26 treesize of output 20 [2021-06-12 20:00:50,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,219 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 15 treesize of output 11 [2021-06-12 20:00:50,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,261 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-12 20:00:50,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:50,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-12 20:00:50,403 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 20:00:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,407 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 [2021-06-12 20:00:50,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,411 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 [2021-06-12 20:00:50,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,415 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 34 treesize of output 26 [2021-06-12 20:00:50,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,419 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 25 treesize of output 19 [2021-06-12 20:00:50,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,423 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 35 treesize of output 27 [2021-06-12 20:00:50,424 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:50,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:50,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,497 INFO L628 ElimStorePlain]: treesize reduction 188, result has 27.7 percent of original size [2021-06-12 20:00:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,500 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 [2021-06-12 20:00:50,501 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,503 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 21 treesize of output 7 [2021-06-12 20:00:50,504 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:50,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:50,532 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-12 20:00:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85256254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:50,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:50,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352902298] [2021-06-12 20:00:50,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:50,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:50,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:50,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:50,590 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) [2021-06-12 20:00:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:51,488 INFO L93 Difference]: Finished difference Result 635 states and 1947 transitions. [2021-06-12 20:00:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:00:51,488 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 [2021-06-12 20:00:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:51,489 INFO L225 Difference]: With dead ends: 635 [2021-06-12 20:00:51,489 INFO L226 Difference]: Without dead ends: 630 [2021-06-12 20:00:51,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-06-12 20:00:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 384. [2021-06-12 20:00:51,494 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) [2021-06-12 20:00:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1236 transitions. [2021-06-12 20:00:51,494 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1236 transitions. Word has length 18 [2021-06-12 20:00:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:51,494 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1236 transitions. [2021-06-12 20:00:51,494 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) [2021-06-12 20:00:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1236 transitions. [2021-06-12 20:00:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:51,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:51,495 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:51,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6633,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:51,695 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:51,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2105176344, now seen corresponding path program 237 times [2021-06-12 20:00:51,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:51,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426587543] [2021-06-12 20:00:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:51,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426587543] [2021-06-12 20:00:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426587543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:51,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497962904] [2021-06-12 20:00:51,886 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 [2021-06-12 20:00:51,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:00:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:51,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:51,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,026 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 27 treesize of output 21 [2021-06-12 20:00:52,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:52,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,031 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 17 treesize of output 13 [2021-06-12 20:00:52,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,034 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 [2021-06-12 20:00:52,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:52,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:52,077 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-12 20:00:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,166 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 18 treesize of output 14 [2021-06-12 20:00:52,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,171 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 29 treesize of output 23 [2021-06-12 20:00:52,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,175 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 19 treesize of output 15 [2021-06-12 20:00:52,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,179 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 17 treesize of output 13 [2021-06-12 20:00:52,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:52,183 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,187 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 28 treesize of output 22 [2021-06-12 20:00:52,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:52,191 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,194 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 [2021-06-12 20:00:52,195 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:52,197 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,200 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 [2021-06-12 20:00:52,201 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,274 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-12 20:00:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,277 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 11 treesize of output 3 [2021-06-12 20:00:52,278 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,280 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 [2021-06-12 20:00:52,280 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:52,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:52,308 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-12 20:00:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497962904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:52,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479709511] [2021-06-12 20:00:52,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:52,462 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) [2021-06-12 20:00:52,929 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 20:00:53,242 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 20:00:53,388 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-06-12 20:00:53,634 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2021-06-12 20:00:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:53,795 INFO L93 Difference]: Finished difference Result 534 states and 1626 transitions. [2021-06-12 20:00:53,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:53,795 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 [2021-06-12 20:00:53,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:53,796 INFO L225 Difference]: With dead ends: 534 [2021-06-12 20:00:53,796 INFO L226 Difference]: Without dead ends: 518 [2021-06-12 20:00:53,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1366.7ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-12 20:00:53,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 383. [2021-06-12 20:00:53,800 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) [2021-06-12 20:00:53,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1232 transitions. [2021-06-12 20:00:53,800 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1232 transitions. Word has length 18 [2021-06-12 20:00:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:53,800 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1232 transitions. [2021-06-12 20:00:53,800 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) [2021-06-12 20:00:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1232 transitions. [2021-06-12 20:00:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:53,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:53,801 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:54,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6646,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:54,001 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:54,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:54,002 INFO L82 PathProgramCache]: Analyzing trace with hash 216795586, now seen corresponding path program 238 times [2021-06-12 20:00:54,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:54,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568188387] [2021-06-12 20:00:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:54,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568188387] [2021-06-12 20:00:54,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568188387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454324281] [2021-06-12 20:00:54,169 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 [2021-06-12 20:00:54,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:54,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:54,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:54,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,285 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 16 treesize of output 12 [2021-06-12 20:00:54,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,289 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 25 treesize of output 19 [2021-06-12 20:00:54,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,292 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 26 treesize of output 20 [2021-06-12 20:00:54,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,296 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 15 treesize of output 11 [2021-06-12 20:00:54,296 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,337 INFO L628 ElimStorePlain]: treesize reduction 28, result has 68.5 percent of original size [2021-06-12 20:00:54,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:54,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:135, output treesize:61 [2021-06-12 20:00:54,386 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 7 treesize of output 5 [2021-06-12 20:00:54,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,391 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 [2021-06-12 20:00:54,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,394 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 18 treesize of output 14 [2021-06-12 20:00:54,395 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,399 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 34 treesize of output 26 [2021-06-12 20:00:54,399 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,403 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 25 treesize of output 19 [2021-06-12 20:00:54,404 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,407 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 25 treesize of output 19 [2021-06-12 20:00:54,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:54,411 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,414 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 35 treesize of output 27 [2021-06-12 20:00:54,416 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 20:00:54,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:54,419 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,486 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-12 20:00:54,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:54,489 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 21 treesize of output 7 [2021-06-12 20:00:54,490 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,492 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 21 treesize of output 7 [2021-06-12 20:00:54,493 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:54,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:54,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:54,530 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-12 20:00:54,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454324281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:54,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013313255] [2021-06-12 20:00:54,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:54,633 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) [2021-06-12 20:00:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:55,080 INFO L93 Difference]: Finished difference Result 534 states and 1636 transitions. [2021-06-12 20:00:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:00:55,081 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 [2021-06-12 20:00:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:55,082 INFO L225 Difference]: With dead ends: 534 [2021-06-12 20:00:55,082 INFO L226 Difference]: Without dead ends: 529 [2021-06-12 20:00:55,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 511.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-12 20:00:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 384. [2021-06-12 20:00:55,086 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) [2021-06-12 20:00:55,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1235 transitions. [2021-06-12 20:00:55,086 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1235 transitions. Word has length 18 [2021-06-12 20:00:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:55,086 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1235 transitions. [2021-06-12 20:00:55,086 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) [2021-06-12 20:00:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1235 transitions. [2021-06-12 20:00:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:55,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:55,087 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:55,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6660,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:55,287 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:55,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1578351692, now seen corresponding path program 239 times [2021-06-12 20:00:55,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:55,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167788158] [2021-06-12 20:00:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:55,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167788158] [2021-06-12 20:00:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167788158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067643755] [2021-06-12 20:00:55,488 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 [2021-06-12 20:00:55,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:00:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:55,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:55,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:55,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:00:55,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,607 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 26 treesize of output 20 [2021-06-12 20:00:55,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,611 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 15 treesize of output 11 [2021-06-12 20:00:55,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,615 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 16 treesize of output 12 [2021-06-12 20:00:55,615 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,690 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.3 percent of original size [2021-06-12 20:00:55,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:55,692 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:153, output treesize:103 [2021-06-12 20:00:55,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,762 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 16 treesize of output 12 [2021-06-12 20:00:55,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,766 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 18 treesize of output 14 [2021-06-12 20:00:55,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,839 INFO L628 ElimStorePlain]: treesize reduction 103, result has 46.6 percent of original size [2021-06-12 20:00:55,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,842 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 27 treesize of output 21 [2021-06-12 20:00:55,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:55,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,877 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1737 vanished before elimination [2021-06-12 20:00:55,879 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 7 treesize of output 5 [2021-06-12 20:00:55,880 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,932 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-12 20:00:55,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,935 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 21 treesize of output 7 [2021-06-12 20:00:55,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,938 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 [2021-06-12 20:00:55,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:55,969 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:00:55,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:55,970 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:217, output treesize:56 [2021-06-12 20:00:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:56,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067643755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:56,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:56,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:00:56,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685199562] [2021-06-12 20:00:56,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:00:56,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:00:56,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:00:56,080 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) [2021-06-12 20:00:56,418 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-12 20:00:56,697 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-06-12 20:00:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:56,894 INFO L93 Difference]: Finished difference Result 535 states and 1633 transitions. [2021-06-12 20:00:56,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:00:56,894 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 [2021-06-12 20:00:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:56,895 INFO L225 Difference]: With dead ends: 535 [2021-06-12 20:00:56,895 INFO L226 Difference]: Without dead ends: 524 [2021-06-12 20:00:56,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 856.3ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:00:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-06-12 20:00:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 382. [2021-06-12 20:00:56,899 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) [2021-06-12 20:00:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1225 transitions. [2021-06-12 20:00:56,900 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1225 transitions. Word has length 18 [2021-06-12 20:00:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:56,900 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1225 transitions. [2021-06-12 20:00:56,900 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) [2021-06-12 20:00:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1225 transitions. [2021-06-12 20:00:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:56,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:56,900 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:57,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6673 [2021-06-12 20:00:57,101 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1977028402, now seen corresponding path program 240 times [2021-06-12 20:00:57,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:57,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013747845] [2021-06-12 20:00:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:57,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:57,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013747845] [2021-06-12 20:00:57,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013747845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024821489] [2021-06-12 20:00:57,273 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 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 [2021-06-12 20:00:57,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:00:57,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:00:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:57,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,416 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 27 treesize of output 21 [2021-06-12 20:00:57,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:57,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,420 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 15 treesize of output 11 [2021-06-12 20:00:57,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,424 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 17 treesize of output 13 [2021-06-12 20:00:57,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,427 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 [2021-06-12 20:00:57,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:57,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:133 [2021-06-12 20:00:57,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,553 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 16 treesize of output 12 [2021-06-12 20:00:57,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,557 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 [2021-06-12 20:00:57,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:57,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,565 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 [2021-06-12 20:00:57,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,569 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 28 treesize of output 22 [2021-06-12 20:00:57,570 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,574 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 18 treesize of output 14 [2021-06-12 20:00:57,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,578 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 26 treesize of output 20 [2021-06-12 20:00:57,579 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:57,582 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,586 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 19 treesize of output 15 [2021-06-12 20:00:57,586 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:57,589 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,667 INFO L628 ElimStorePlain]: treesize reduction 108, result has 50.2 percent of original size [2021-06-12 20:00:57,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:57,670 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 [2021-06-12 20:00:57,671 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,673 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 21 treesize of output 7 [2021-06-12 20:00:57,674 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:57,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:57,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:57,708 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:421, output treesize:87 [2021-06-12 20:00:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:57,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024821489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:57,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:57,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:00:57,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86331580] [2021-06-12 20:00:57,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:00:57,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:00:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:00:57,830 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) [2021-06-12 20:00:58,506 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-12 20:00:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:58,910 INFO L93 Difference]: Finished difference Result 583 states and 1787 transitions. [2021-06-12 20:00:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:00:58,911 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 [2021-06-12 20:00:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:58,912 INFO L225 Difference]: With dead ends: 583 [2021-06-12 20:00:58,912 INFO L226 Difference]: Without dead ends: 577 [2021-06-12 20:00:58,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1093.8ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:00:58,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-12 20:00:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 378. [2021-06-12 20:00:58,916 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) [2021-06-12 20:00:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1212 transitions. [2021-06-12 20:00:58,916 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1212 transitions. Word has length 18 [2021-06-12 20:00:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:58,916 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1212 transitions. [2021-06-12 20:00:58,917 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) [2021-06-12 20:00:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1212 transitions. [2021-06-12 20:00:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:00:58,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:58,917 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:59,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6686 [2021-06-12 20:00:59,118 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1028287122, now seen corresponding path program 241 times [2021-06-12 20:00:59,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:59,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795710559] [2021-06-12 20:00:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795710559] [2021-06-12 20:00:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795710559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669271284] [2021-06-12 20:00:59,273 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 [2021-06-12 20:00:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:00:59,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:59,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,383 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 [2021-06-12 20:00:59,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,387 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 27 treesize of output 21 [2021-06-12 20:00:59,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:00:59,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,391 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 [2021-06-12 20:00:59,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,394 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 17 treesize of output 13 [2021-06-12 20:00:59,394 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:00:59,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:00:59,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-06-12 20:00:59,822 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-12 20:00:59,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,827 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 16 treesize of output 12 [2021-06-12 20:00:59,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,832 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 18 treesize of output 14 [2021-06-12 20:00:59,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,837 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 15 treesize of output 11 [2021-06-12 20:00:59,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,841 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 16 treesize of output 12 [2021-06-12 20:00:59,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,846 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 20 treesize of output 16 [2021-06-12 20:00:59,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,851 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 29 treesize of output 23 [2021-06-12 20:00:59,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,855 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 17 treesize of output 13 [2021-06-12 20:00:59,856 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,860 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 25 treesize of output 19 [2021-06-12 20:00:59,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,865 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 26 treesize of output 20 [2021-06-12 20:00:59,866 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,870 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 19 treesize of output 15 [2021-06-12 20:00:59,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,874 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 28 treesize of output 22 [2021-06-12 20:00:59,875 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,879 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 [2021-06-12 20:00:59,880 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,027 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 20:01:00,027 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-06-12 20:01:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,032 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 [2021-06-12 20:01:00,032 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,036 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 9 treesize of output 3 [2021-06-12 20:01:00,037 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,040 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 [2021-06-12 20:01:00,040 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:00,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:01:00,103 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:399, output treesize:72 [2021-06-12 20:01:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669271284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:00,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:01:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667766658] [2021-06-12 20:01:00,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:00,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:00,192 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) [2021-06-12 20:01:00,588 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-06-12 20:01:00,901 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2021-06-12 20:01:01,304 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 105 [2021-06-12 20:01:01,738 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 108 [2021-06-12 20:01:02,077 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 88 [2021-06-12 20:01:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:02,144 INFO L93 Difference]: Finished difference Result 583 states and 1754 transitions. [2021-06-12 20:01:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:02,144 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 [2021-06-12 20:01:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:02,145 INFO L225 Difference]: With dead ends: 583 [2021-06-12 20:01:02,145 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 20:01:02,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2115.1ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:01:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 20:01:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 383. [2021-06-12 20:01:02,150 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) [2021-06-12 20:01:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1222 transitions. [2021-06-12 20:01:02,150 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1222 transitions. Word has length 18 [2021-06-12 20:01:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:02,150 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 1222 transitions. [2021-06-12 20:01:02,150 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) [2021-06-12 20:01:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1222 transitions. [2021-06-12 20:01:02,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:02,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:02,151 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:02,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6701,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:02,351 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:02,352 INFO L82 PathProgramCache]: Analyzing trace with hash -102263678, now seen corresponding path program 242 times [2021-06-12 20:01:02,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:02,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997398995] [2021-06-12 20:01:02,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:02,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997398995] [2021-06-12 20:01:02,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997398995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322116476] [2021-06-12 20:01:02,514 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 [2021-06-12 20:01:02,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:02,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:02,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:02,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:02,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,610 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 25 treesize of output 19 [2021-06-12 20:01:02,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,614 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 16 treesize of output 12 [2021-06-12 20:01:02,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,617 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 [2021-06-12 20:01:02,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,621 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 24 treesize of output 18 [2021-06-12 20:01:02,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,624 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 25 treesize of output 19 [2021-06-12 20:01:02,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,628 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 15 treesize of output 11 [2021-06-12 20:01:02,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,688 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:01:02,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:02,689 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:01:02,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,979 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 [2021-06-12 20:01:02,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,983 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 15 treesize of output 11 [2021-06-12 20:01:02,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,045 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-12 20:01:03,046 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:03,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:03,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1751 vanished before elimination [2021-06-12 20:01:03,073 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 27 treesize of output 21 [2021-06-12 20:01:03,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:03,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,102 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 20 treesize of output 9 [2021-06-12 20:01:03,103 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:03,106 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 10 treesize of output 5 [2021-06-12 20:01:03,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:03,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:03,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:03,138 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 20:01:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322116476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:03,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:03,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316531381] [2021-06-12 20:01:03,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:03,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:03,199 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) [2021-06-12 20:01:03,596 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-06-12 20:01:03,830 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-06-12 20:01:04,018 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 76 [2021-06-12 20:01:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:04,131 INFO L93 Difference]: Finished difference Result 577 states and 1743 transitions. [2021-06-12 20:01:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:04,132 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 [2021-06-12 20:01:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:04,133 INFO L225 Difference]: With dead ends: 577 [2021-06-12 20:01:04,133 INFO L226 Difference]: Without dead ends: 570 [2021-06-12 20:01:04,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1079.5ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-12 20:01:04,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 377. [2021-06-12 20:01:04,137 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) [2021-06-12 20:01:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1207 transitions. [2021-06-12 20:01:04,137 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1207 transitions. Word has length 18 [2021-06-12 20:01:04,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:04,137 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1207 transitions. [2021-06-12 20:01:04,138 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) [2021-06-12 20:01:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1207 transitions. [2021-06-12 20:01:04,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:04,138 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:04,138 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:04,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6719 [2021-06-12 20:01:04,338 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:04,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:04,339 INFO L82 PathProgramCache]: Analyzing trace with hash -360500806, now seen corresponding path program 243 times [2021-06-12 20:01:04,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:04,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265913493] [2021-06-12 20:01:04,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265913493] [2021-06-12 20:01:04,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265913493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044963832] [2021-06-12 20:01:04,473 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 [2021-06-12 20:01:04,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:01:04,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,560 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 15 treesize of output 11 [2021-06-12 20:01:04,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,563 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 16 treesize of output 12 [2021-06-12 20:01:04,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,566 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 26 treesize of output 20 [2021-06-12 20:01:04,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,575 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 25 treesize of output 19 [2021-06-12 20:01:04,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,609 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-12 20:01:04,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:04,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-12 20:01:04,771 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 20:01:04,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,775 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 15 treesize of output 11 [2021-06-12 20:01:04,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,779 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 [2021-06-12 20:01:04,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,783 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 [2021-06-12 20:01:04,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,787 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 35 treesize of output 27 [2021-06-12 20:01:04,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:04,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:04,792 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,795 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 34 treesize of output 26 [2021-06-12 20:01:04,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,867 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-06-12 20:01:04,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,870 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 21 treesize of output 7 [2021-06-12 20:01:04,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,873 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 21 treesize of output 7 [2021-06-12 20:01:04,874 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:04,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:04,902 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-12 20:01:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044963832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:04,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:04,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547065066] [2021-06-12 20:01:04,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:04,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:04,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:04,959 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) [2021-06-12 20:01:05,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:05,404 INFO L93 Difference]: Finished difference Result 593 states and 1811 transitions. [2021-06-12 20:01:05,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:05,405 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 [2021-06-12 20:01:05,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:05,405 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:01:05,405 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:01:05,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:01:05,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 377. [2021-06-12 20:01:05,410 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) [2021-06-12 20:01:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1207 transitions. [2021-06-12 20:01:05,410 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1207 transitions. Word has length 18 [2021-06-12 20:01:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:05,410 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1207 transitions. [2021-06-12 20:01:05,410 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) [2021-06-12 20:01:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1207 transitions. [2021-06-12 20:01:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:05,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:05,411 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:05,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6744,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:05,611 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2085617846, now seen corresponding path program 244 times [2021-06-12 20:01:05,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:05,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381524665] [2021-06-12 20:01:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:05,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:05,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381524665] [2021-06-12 20:01:05,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381524665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:05,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751614885] [2021-06-12 20:01:05,791 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 [2021-06-12 20:01:05,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:05,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:05,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,898 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 25 treesize of output 19 [2021-06-12 20:01:05,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 20:01:05,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,905 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 15 treesize of output 11 [2021-06-12 20:01:05,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:05,908 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 17 treesize of output 13 [2021-06-12 20:01:05,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:05,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:05,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:05,941 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-06-12 20:01:06,309 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-12 20:01:06,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,314 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 16 treesize of output 12 [2021-06-12 20:01:06,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,319 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 18 treesize of output 14 [2021-06-12 20:01:06,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,324 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 19 treesize of output 15 [2021-06-12 20:01:06,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,328 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 25 treesize of output 19 [2021-06-12 20:01:06,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,333 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 29 treesize of output 23 [2021-06-12 20:01:06,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,338 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 26 treesize of output 20 [2021-06-12 20:01:06,339 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,343 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 [2021-06-12 20:01:06,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,349 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 15 treesize of output 11 [2021-06-12 20:01:06,349 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,353 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 [2021-06-12 20:01:06,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,358 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 [2021-06-12 20:01:06,359 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,363 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 28 treesize of output 22 [2021-06-12 20:01:06,363 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,367 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 20 treesize of output 16 [2021-06-12 20:01:06,368 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,515 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 20:01:06,516 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.6 percent of original size [2021-06-12 20:01:06,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,520 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 11 treesize of output 3 [2021-06-12 20:01:06,520 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,524 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 9 treesize of output 3 [2021-06-12 20:01:06,525 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,528 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 [2021-06-12 20:01:06,529 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:06,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:01:06,596 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:399, output treesize:72 [2021-06-12 20:01:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751614885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:06,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:01:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4197589] [2021-06-12 20:01:06,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:06,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:06,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:06,683 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) [2021-06-12 20:01:07,313 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-06-12 20:01:07,626 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 97 [2021-06-12 20:01:07,855 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-12 20:01:08,021 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-06-12 20:01:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:08,098 INFO L93 Difference]: Finished difference Result 576 states and 1752 transitions. [2021-06-12 20:01:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:01:08,099 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 [2021-06-12 20:01:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:08,100 INFO L225 Difference]: With dead ends: 576 [2021-06-12 20:01:08,100 INFO L226 Difference]: Without dead ends: 566 [2021-06-12 20:01:08,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1502.7ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:01:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-12 20:01:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 380. [2021-06-12 20:01:08,104 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) [2021-06-12 20:01:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1212 transitions. [2021-06-12 20:01:08,104 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1212 transitions. Word has length 18 [2021-06-12 20:01:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:08,105 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1212 transitions. [2021-06-12 20:01:08,105 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) [2021-06-12 20:01:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1212 transitions. [2021-06-12 20:01:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:08,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:08,105 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:08,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6757,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:08,306 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:08,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1159594402, now seen corresponding path program 245 times [2021-06-12 20:01:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:08,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245630225] [2021-06-12 20:01:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:08,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245630225] [2021-06-12 20:01:08,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245630225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58752610] [2021-06-12 20:01:08,517 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 [2021-06-12 20:01:08,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:08,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:08,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:08,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:08,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,613 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 25 treesize of output 19 [2021-06-12 20:01:08,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,617 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 16 treesize of output 12 [2021-06-12 20:01:08,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,620 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 26 treesize of output 20 [2021-06-12 20:01:08,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,624 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 24 treesize of output 18 [2021-06-12 20:01:08,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,627 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 25 treesize of output 19 [2021-06-12 20:01:08,628 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,630 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 15 treesize of output 11 [2021-06-12 20:01:08,631 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,692 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:01:08,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:08,693 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:01:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,986 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 25 treesize of output 19 [2021-06-12 20:01:08,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,991 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 [2021-06-12 20:01:08,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,053 INFO L628 ElimStorePlain]: treesize reduction 104, result has 42.5 percent of original size [2021-06-12 20:01:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,056 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 27 treesize of output 21 [2021-06-12 20:01:09,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:09,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,082 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1770 vanished before elimination [2021-06-12 20:01:09,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:09,086 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 10 treesize of output 5 [2021-06-12 20:01:09,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,089 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 20 treesize of output 9 [2021-06-12 20:01:09,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:09,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:09,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:09,148 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1771 vanished before elimination [2021-06-12 20:01:09,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:09,149 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 9 variables, input treesize:195, output treesize:45 [2021-06-12 20:01:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:09,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58752610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:09,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:09,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287602058] [2021-06-12 20:01:09,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:09,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:09,210 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) [2021-06-12 20:01:09,762 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-12 20:01:09,921 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-12 20:01:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:10,023 INFO L93 Difference]: Finished difference Result 546 states and 1667 transitions. [2021-06-12 20:01:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:10,023 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 [2021-06-12 20:01:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:10,024 INFO L225 Difference]: With dead ends: 546 [2021-06-12 20:01:10,024 INFO L226 Difference]: Without dead ends: 539 [2021-06-12 20:01:10,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1004.8ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-12 20:01:10,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 376. [2021-06-12 20:01:10,028 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) [2021-06-12 20:01:10,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1202 transitions. [2021-06-12 20:01:10,029 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1202 transitions. Word has length 18 [2021-06-12 20:01:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:10,029 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1202 transitions. [2021-06-12 20:01:10,029 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) [2021-06-12 20:01:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1202 transitions. [2021-06-12 20:01:10,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:10,029 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:10,029 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:10,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6775,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:10,230 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:10,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:10,230 INFO L82 PathProgramCache]: Analyzing trace with hash 914447872, now seen corresponding path program 246 times [2021-06-12 20:01:10,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:10,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64957740] [2021-06-12 20:01:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:10,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64957740] [2021-06-12 20:01:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64957740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959215044] [2021-06-12 20:01:10,388 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 [2021-06-12 20:01:10,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:01:10,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:10,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:10,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:10,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,476 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 15 treesize of output 11 [2021-06-12 20:01:10,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,485 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 16 treesize of output 12 [2021-06-12 20:01:10,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,488 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 [2021-06-12 20:01:10,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,492 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 [2021-06-12 20:01:10,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,527 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-12 20:01:10,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:10,527 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-12 20:01:10,694 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 20:01:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,698 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 34 treesize of output 26 [2021-06-12 20:01:10,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,702 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 15 treesize of output 11 [2021-06-12 20:01:10,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:10,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,710 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 35 treesize of output 27 [2021-06-12 20:01:10,711 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:10,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,715 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 25 treesize of output 19 [2021-06-12 20:01:10,715 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,718 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 [2021-06-12 20:01:10,719 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,791 INFO L628 ElimStorePlain]: treesize reduction 182, result has 30.0 percent of original size [2021-06-12 20:01:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,794 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 21 treesize of output 7 [2021-06-12 20:01:10,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,798 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 21 treesize of output 7 [2021-06-12 20:01:10,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:10,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:10,826 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:256, output treesize:38 [2021-06-12 20:01:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959215044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:10,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:10,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147541073] [2021-06-12 20:01:10,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:10,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:10,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:10,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:10,883 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) [2021-06-12 20:01:11,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:11,406 INFO L93 Difference]: Finished difference Result 552 states and 1691 transitions. [2021-06-12 20:01:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:11,406 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 [2021-06-12 20:01:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:11,407 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:01:11,407 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:01:11,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:01:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 376. [2021-06-12 20:01:11,412 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) [2021-06-12 20:01:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1202 transitions. [2021-06-12 20:01:11,412 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1202 transitions. Word has length 18 [2021-06-12 20:01:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:11,412 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 1202 transitions. [2021-06-12 20:01:11,413 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) [2021-06-12 20:01:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1202 transitions. [2021-06-12 20:01:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:11,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:11,413 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:11,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6800,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:11,613 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1149555154, now seen corresponding path program 247 times [2021-06-12 20:01:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:11,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181255162] [2021-06-12 20:01:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:11,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:11,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181255162] [2021-06-12 20:01:11,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181255162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:11,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250855274] [2021-06-12 20:01:11,791 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 [2021-06-12 20:01:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:11,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:11,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,898 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 25 treesize of output 19 [2021-06-12 20:01:11,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,902 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 27 treesize of output 21 [2021-06-12 20:01:11,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:11,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,905 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 15 treesize of output 11 [2021-06-12 20:01:11,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,909 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 17 treesize of output 13 [2021-06-12 20:01:11,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:11,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:11,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:121 [2021-06-12 20:01:12,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,069 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 29 treesize of output 23 [2021-06-12 20:01:12,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,074 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 17 treesize of output 13 [2021-06-12 20:01:12,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,078 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 19 treesize of output 15 [2021-06-12 20:01:12,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,082 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 [2021-06-12 20:01:12,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,086 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 25 treesize of output 19 [2021-06-12 20:01:12,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:12,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,094 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 [2021-06-12 20:01:12,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:12,097 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,101 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 15 treesize of output 11 [2021-06-12 20:01:12,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:12,104 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,172 INFO L628 ElimStorePlain]: treesize reduction 95, result has 48.4 percent of original size [2021-06-12 20:01:12,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,175 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 [2021-06-12 20:01:12,175 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,177 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 21 treesize of output 7 [2021-06-12 20:01:12,178 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:12,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:12,205 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-12 20:01:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:12,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250855274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:12,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:12,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:01:12,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072690945] [2021-06-12 20:01:12,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:01:12,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:01:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:12,318 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) [2021-06-12 20:01:12,926 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-06-12 20:01:13,123 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-12 20:01:13,338 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 69 [2021-06-12 20:01:13,501 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-06-12 20:01:13,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:13,548 INFO L93 Difference]: Finished difference Result 590 states and 1792 transitions. [2021-06-12 20:01:13,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:01:13,549 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 [2021-06-12 20:01:13,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:13,550 INFO L225 Difference]: With dead ends: 590 [2021-06-12 20:01:13,550 INFO L226 Difference]: Without dead ends: 582 [2021-06-12 20:01:13,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1283.1ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:01:13,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-06-12 20:01:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 377. [2021-06-12 20:01:13,554 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) [2021-06-12 20:01:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1203 transitions. [2021-06-12 20:01:13,554 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1203 transitions. Word has length 18 [2021-06-12 20:01:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:13,554 INFO L482 AbstractCegarLoop]: Abstraction has 377 states and 1203 transitions. [2021-06-12 20:01:13,554 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) [2021-06-12 20:01:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1203 transitions. [2021-06-12 20:01:13,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:13,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:13,555 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:13,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6813 [2021-06-12 20:01:13,755 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:13,756 INFO L82 PathProgramCache]: Analyzing trace with hash -223531710, now seen corresponding path program 248 times [2021-06-12 20:01:13,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:13,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670379048] [2021-06-12 20:01:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670379048] [2021-06-12 20:01:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670379048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295045634] [2021-06-12 20:01:13,958 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 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 [2021-06-12 20:01:13,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:14,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,054 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 25 treesize of output 19 [2021-06-12 20:01:14,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,058 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 [2021-06-12 20:01:14,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,061 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 26 treesize of output 20 [2021-06-12 20:01:14,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,065 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 24 treesize of output 18 [2021-06-12 20:01:14,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,069 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 25 treesize of output 19 [2021-06-12 20:01:14,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,072 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 15 treesize of output 11 [2021-06-12 20:01:14,072 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,134 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:01:14,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:14,135 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:01:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,252 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 16 treesize of output 12 [2021-06-12 20:01:14,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:14,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,260 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 25 treesize of output 19 [2021-06-12 20:01:14,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,264 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 26 treesize of output 20 [2021-06-12 20:01:14,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,268 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 15 treesize of output 11 [2021-06-12 20:01:14,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,272 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 [2021-06-12 20:01:14,273 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,275 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 35 treesize of output 27 [2021-06-12 20:01:14,277 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:14,343 INFO L628 ElimStorePlain]: treesize reduction 196, result has 29.2 percent of original size [2021-06-12 20:01:14,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:14,346 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 20 treesize of output 9 [2021-06-12 20:01:14,347 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,349 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 20 treesize of output 9 [2021-06-12 20:01:14,350 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:14,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:14,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:14,380 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:59 [2021-06-12 20:01:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:14,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295045634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:14,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:14,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272843011] [2021-06-12 20:01:14,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:14,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:14,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:14,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:14,513 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) [2021-06-12 20:01:14,969 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-06-12 20:01:15,165 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-06-12 20:01:15,413 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2021-06-12 20:01:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:15,538 INFO L93 Difference]: Finished difference Result 546 states and 1664 transitions. [2021-06-12 20:01:15,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:15,538 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 [2021-06-12 20:01:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:15,539 INFO L225 Difference]: With dead ends: 546 [2021-06-12 20:01:15,539 INFO L226 Difference]: Without dead ends: 539 [2021-06-12 20:01:15,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1149.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-06-12 20:01:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 375. [2021-06-12 20:01:15,543 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) [2021-06-12 20:01:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1198 transitions. [2021-06-12 20:01:15,544 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1198 transitions. Word has length 18 [2021-06-12 20:01:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:15,544 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1198 transitions. [2021-06-12 20:01:15,544 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) [2021-06-12 20:01:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1198 transitions. [2021-06-12 20:01:15,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:15,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:15,544 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:15,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6828,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:15,745 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:15,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1257031384, now seen corresponding path program 249 times [2021-06-12 20:01:15,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:15,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607165576] [2021-06-12 20:01:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:15,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:15,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607165576] [2021-06-12 20:01:15,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607165576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090041420] [2021-06-12 20:01:15,949 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 [2021-06-12 20:01:15,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:01:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:15,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:15,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:16,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,042 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 15 treesize of output 11 [2021-06-12 20:01:16,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,045 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 16 treesize of output 12 [2021-06-12 20:01:16,046 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,049 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 [2021-06-12 20:01:16,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:01:16,053 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,087 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-12 20:01:16,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:16,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-12 20:01:16,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:16,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,166 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 15 treesize of output 11 [2021-06-12 20:01:16,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:16,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,174 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 34 treesize of output 26 [2021-06-12 20:01:16,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,178 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 25 treesize of output 19 [2021-06-12 20:01:16,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,182 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 [2021-06-12 20:01:16,183 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:16,186 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,189 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 35 treesize of output 27 [2021-06-12 20:01:16,191 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:16,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:16,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,261 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-12 20:01:16,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:16,264 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 21 treesize of output 7 [2021-06-12 20:01:16,265 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,267 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 [2021-06-12 20:01:16,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:16,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:16,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:16,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:16,298 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-12 20:01:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:16,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090041420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:16,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:16,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:16,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815200679] [2021-06-12 20:01:16,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:16,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:16,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:16,407 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) [2021-06-12 20:01:16,841 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-06-12 20:01:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:16,986 INFO L93 Difference]: Finished difference Result 559 states and 1694 transitions. [2021-06-12 20:01:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:16,986 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 [2021-06-12 20:01:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:16,987 INFO L225 Difference]: With dead ends: 559 [2021-06-12 20:01:16,987 INFO L226 Difference]: Without dead ends: 554 [2021-06-12 20:01:16,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 674.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-06-12 20:01:16,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 375. [2021-06-12 20:01:16,991 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) [2021-06-12 20:01:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1198 transitions. [2021-06-12 20:01:16,991 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1198 transitions. Word has length 18 [2021-06-12 20:01:16,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:16,991 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1198 transitions. [2021-06-12 20:01:16,992 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) [2021-06-12 20:01:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1198 transitions. [2021-06-12 20:01:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:16,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:16,992 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:17,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6843 [2021-06-12 20:01:17,192 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1676379806, now seen corresponding path program 250 times [2021-06-12 20:01:17,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:17,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242660391] [2021-06-12 20:01:17,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:17,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:17,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242660391] [2021-06-12 20:01:17,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242660391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556412837] [2021-06-12 20:01:17,422 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 [2021-06-12 20:01:17,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:17,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,510 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 15 treesize of output 11 [2021-06-12 20:01:17,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,514 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 [2021-06-12 20:01:17,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,517 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 26 treesize of output 20 [2021-06-12 20:01:17,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,520 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 [2021-06-12 20:01:17,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,555 INFO L628 ElimStorePlain]: treesize reduction 25, result has 67.5 percent of original size [2021-06-12 20:01:17,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:17,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:123, output treesize:52 [2021-06-12 20:01:17,629 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 7 treesize of output 5 [2021-06-12 20:01:17,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,634 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 15 treesize of output 11 [2021-06-12 20:01:17,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,637 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 18 treesize of output 14 [2021-06-12 20:01:17,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,642 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 34 treesize of output 26 [2021-06-12 20:01:17,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,646 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 [2021-06-12 20:01:17,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,650 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 [2021-06-12 20:01:17,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:17,654 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,657 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 35 treesize of output 27 [2021-06-12 20:01:17,659 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:17,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:17,662 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,730 INFO L628 ElimStorePlain]: treesize reduction 187, result has 30.7 percent of original size [2021-06-12 20:01:17,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,732 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 21 treesize of output 7 [2021-06-12 20:01:17,733 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,735 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 [2021-06-12 20:01:17,736 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:17,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:17,766 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:316, output treesize:55 [2021-06-12 20:01:17,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:17,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556412837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:17,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:17,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730873915] [2021-06-12 20:01:17,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:17,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:17,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:17,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:17,878 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) [2021-06-12 20:01:18,404 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2021-06-12 20:01:18,635 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 75 [2021-06-12 20:01:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:18,697 INFO L93 Difference]: Finished difference Result 542 states and 1651 transitions. [2021-06-12 20:01:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:18,698 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 [2021-06-12 20:01:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:18,698 INFO L225 Difference]: With dead ends: 542 [2021-06-12 20:01:18,698 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 20:01:18,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 906.0ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:18,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 20:01:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 375. [2021-06-12 20:01:18,702 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) [2021-06-12 20:01:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1197 transitions. [2021-06-12 20:01:18,703 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1197 transitions. Word has length 18 [2021-06-12 20:01:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:18,703 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1197 transitions. [2021-06-12 20:01:18,703 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) [2021-06-12 20:01:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1197 transitions. [2021-06-12 20:01:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:18,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:18,704 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:18,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6856,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:18,904 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:18,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:18,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1815558674, now seen corresponding path program 251 times [2021-06-12 20:01:18,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:18,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915046052] [2021-06-12 20:01:18,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:19,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915046052] [2021-06-12 20:01:19,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915046052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:19,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875329900] [2021-06-12 20:01:19,111 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 [2021-06-12 20:01:19,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:19,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:19,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,229 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 34 treesize of output 26 [2021-06-12 20:01:19,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,234 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 15 treesize of output 11 [2021-06-12 20:01:19,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,238 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 [2021-06-12 20:01:19,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,242 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 [2021-06-12 20:01:19,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,247 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 25 treesize of output 19 [2021-06-12 20:01:19,248 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,251 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 24 treesize of output 18 [2021-06-12 20:01:19,252 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,376 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 20:01:19,377 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.6 percent of original size [2021-06-12 20:01:19,383 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. [2021-06-12 20:01:19,383 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:238, output treesize:213 [2021-06-12 20:01:19,637 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-12 20:01:19,721 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-06-12 20:01:19,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,727 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 29 treesize of output 23 [2021-06-12 20:01:19,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,733 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 26 treesize of output 20 [2021-06-12 20:01:19,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,740 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 25 treesize of output 19 [2021-06-12 20:01:19,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,745 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 29 treesize of output 23 [2021-06-12 20:01:19,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,751 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 [2021-06-12 20:01:19,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,757 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 26 treesize of output 20 [2021-06-12 20:01:19,758 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,763 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 [2021-06-12 20:01:19,763 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,768 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 28 treesize of output 22 [2021-06-12 20:01:19,769 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,774 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 47 treesize of output 37 [2021-06-12 20:01:19,775 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,780 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 28 treesize of output 22 [2021-06-12 20:01:19,781 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,786 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 15 treesize of output 11 [2021-06-12 20:01:19,787 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,792 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 46 treesize of output 36 [2021-06-12 20:01:19,793 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:19,798 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 25 treesize of output 19 [2021-06-12 20:01:19,799 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:19,803 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 29 treesize of output 23 [2021-06-12 20:01:19,804 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:20,011 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2021-06-12 20:01:20,011 INFO L628 ElimStorePlain]: treesize reduction 256, result has 43.4 percent of original size [2021-06-12 20:01:20,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,015 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 11 treesize of output 3 [2021-06-12 20:01:20,016 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,019 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 21 treesize of output 7 [2021-06-12 20:01:20,020 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:20,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-06-12 20:01:20,103 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:655, output treesize:120 [2021-06-12 20:01:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875329900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:20,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:20,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190574280] [2021-06-12 20:01:20,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:20,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:20,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:20,247 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) [2021-06-12 20:01:20,621 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-06-12 20:01:20,995 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2021-06-12 20:01:21,329 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 96 [2021-06-12 20:01:21,724 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 109 [2021-06-12 20:01:21,925 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-12 20:01:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:21,972 INFO L93 Difference]: Finished difference Result 551 states and 1677 transitions. [2021-06-12 20:01:21,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:01:21,973 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 [2021-06-12 20:01:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:21,973 INFO L225 Difference]: With dead ends: 551 [2021-06-12 20:01:21,973 INFO L226 Difference]: Without dead ends: 545 [2021-06-12 20:01:21,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1846.5ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:21,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-12 20:01:21,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 375. [2021-06-12 20:01:21,977 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) [2021-06-12 20:01:21,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1197 transitions. [2021-06-12 20:01:21,978 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1197 transitions. Word has length 18 [2021-06-12 20:01:21,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:21,978 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 1197 transitions. [2021-06-12 20:01:21,978 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) [2021-06-12 20:01:21,978 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1197 transitions. [2021-06-12 20:01:21,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:21,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:21,979 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:22,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6869,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:22,179 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:22,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash -997760802, now seen corresponding path program 252 times [2021-06-12 20:01:22,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:22,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794088418] [2021-06-12 20:01:22,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:22,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:22,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:22,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794088418] [2021-06-12 20:01:22,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794088418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:22,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483659840] [2021-06-12 20:01:22,390 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 [2021-06-12 20:01:22,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:22,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:22,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:22,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,487 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 24 treesize of output 18 [2021-06-12 20:01:22,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,491 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 16 treesize of output 12 [2021-06-12 20:01:22,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,494 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 25 treesize of output 19 [2021-06-12 20:01:22,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,498 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 25 treesize of output 19 [2021-06-12 20:01:22,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,502 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 15 treesize of output 11 [2021-06-12 20:01:22,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,505 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 26 treesize of output 20 [2021-06-12 20:01:22,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,585 INFO L628 ElimStorePlain]: treesize reduction 62, result has 62.0 percent of original size [2021-06-12 20:01:22,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:22,586 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:235, output treesize:101 [2021-06-12 20:01:22,724 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 18 treesize of output 14 [2021-06-12 20:01:22,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,728 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 26 treesize of output 20 [2021-06-12 20:01:22,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,732 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 [2021-06-12 20:01:22,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,736 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 35 treesize of output 27 [2021-06-12 20:01:22,738 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:22,813 INFO L628 ElimStorePlain]: treesize reduction 216, result has 29.4 percent of original size [2021-06-12 20:01:22,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,815 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 20 treesize of output 9 [2021-06-12 20:01:22,816 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,834 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 20 treesize of output 9 [2021-06-12 20:01:22,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:22,873 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:22,897 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1782 vanished before elimination [2021-06-12 20:01:22,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:22,898 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:278, output treesize:61 [2021-06-12 20:01:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:23,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483659840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:23,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654356225] [2021-06-12 20:01:23,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:23,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:23,014 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) [2021-06-12 20:01:23,347 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-12 20:01:23,555 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-06-12 20:01:23,785 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-12 20:01:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:24,065 INFO L93 Difference]: Finished difference Result 554 states and 1688 transitions. [2021-06-12 20:01:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:24,066 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 [2021-06-12 20:01:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:24,067 INFO L225 Difference]: With dead ends: 554 [2021-06-12 20:01:24,067 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:01:24,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1163.7ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:24,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:01:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 374. [2021-06-12 20:01:24,071 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) [2021-06-12 20:01:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1191 transitions. [2021-06-12 20:01:24,071 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1191 transitions. Word has length 18 [2021-06-12 20:01:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:24,071 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1191 transitions. [2021-06-12 20:01:24,071 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) [2021-06-12 20:01:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1191 transitions. [2021-06-12 20:01:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:24,072 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:24,072 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:24,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6886,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:24,272 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:24,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:24,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1277703096, now seen corresponding path program 253 times [2021-06-12 20:01:24,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:24,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579526242] [2021-06-12 20:01:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:24,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579526242] [2021-06-12 20:01:24,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579526242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426171682] [2021-06-12 20:01:24,418 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 [2021-06-12 20:01:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,535 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 15 treesize of output 11 [2021-06-12 20:01:24,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,539 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 34 treesize of output 26 [2021-06-12 20:01:24,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,543 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 [2021-06-12 20:01:24,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,547 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 35 treesize of output 27 [2021-06-12 20:01:24,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:01:24,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,553 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 24 treesize of output 18 [2021-06-12 20:01:24,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,557 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 25 treesize of output 19 [2021-06-12 20:01:24,558 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,686 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 20:01:24,686 INFO L628 ElimStorePlain]: treesize reduction 65, result has 76.6 percent of original size [2021-06-12 20:01:24,693 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. [2021-06-12 20:01:24,693 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:238, output treesize:213 [2021-06-12 20:01:24,988 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-12 20:01:25,206 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 28=[array_2]} [2021-06-12 20:01:25,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,211 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 [2021-06-12 20:01:25,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,217 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 26 treesize of output 20 [2021-06-12 20:01:25,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,222 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 [2021-06-12 20:01:25,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,227 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 29 treesize of output 23 [2021-06-12 20:01:25,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,232 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 [2021-06-12 20:01:25,233 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,237 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 [2021-06-12 20:01:25,243 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,247 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 28 treesize of output 22 [2021-06-12 20:01:25,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,252 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 25 treesize of output 19 [2021-06-12 20:01:25,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,257 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 26 treesize of output 20 [2021-06-12 20:01:25,258 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,263 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 15 treesize of output 11 [2021-06-12 20:01:25,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,267 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 29 treesize of output 23 [2021-06-12 20:01:25,268 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:25,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,272 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 29 treesize of output 23 [2021-06-12 20:01:25,273 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,278 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 15 treesize of output 11 [2021-06-12 20:01:25,278 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,282 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 28 treesize of output 22 [2021-06-12 20:01:25,283 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,427 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2021-06-12 20:01:25,428 INFO L628 ElimStorePlain]: treesize reduction 182, result has 45.7 percent of original size [2021-06-12 20:01:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,432 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 21 treesize of output 7 [2021-06-12 20:01:25,432 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,436 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 [2021-06-12 20:01:25,436 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:25,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:01:25,492 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:499, output treesize:56 [2021-06-12 20:01:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:25,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426171682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:25,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:25,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994874763] [2021-06-12 20:01:25,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:25,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:25,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:25,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:25,578 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) [2021-06-12 20:01:26,116 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-06-12 20:01:26,499 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 118 [2021-06-12 20:01:26,715 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2021-06-12 20:01:26,861 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-12 20:01:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:26,912 INFO L93 Difference]: Finished difference Result 538 states and 1636 transitions. [2021-06-12 20:01:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:26,913 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 [2021-06-12 20:01:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:26,914 INFO L225 Difference]: With dead ends: 538 [2021-06-12 20:01:26,914 INFO L226 Difference]: Without dead ends: 532 [2021-06-12 20:01:26,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1516.8ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-06-12 20:01:26,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 374. [2021-06-12 20:01:26,918 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) [2021-06-12 20:01:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1191 transitions. [2021-06-12 20:01:26,918 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1191 transitions. Word has length 18 [2021-06-12 20:01:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 1191 transitions. [2021-06-12 20:01:26,918 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) [2021-06-12 20:01:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1191 transitions. [2021-06-12 20:01:26,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:26,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:26,919 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:27,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6904,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:27,119 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:27,120 INFO L82 PathProgramCache]: Analyzing trace with hash 910480080, now seen corresponding path program 254 times [2021-06-12 20:01:27,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:27,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606430887] [2021-06-12 20:01:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:27,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606430887] [2021-06-12 20:01:27,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606430887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472090819] [2021-06-12 20:01:27,292 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 [2021-06-12 20:01:27,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:27,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:27,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:27,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,396 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 [2021-06-12 20:01:27,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,400 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 [2021-06-12 20:01:27,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,403 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 17 treesize of output 13 [2021-06-12 20:01:27,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,406 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 27 treesize of output 21 [2021-06-12 20:01:27,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:27,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:27,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:125, output treesize:115 [2021-06-12 20:01:27,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,561 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 29 treesize of output 23 [2021-06-12 20:01:27,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,566 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 15 treesize of output 11 [2021-06-12 20:01:27,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,570 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 19 treesize of output 15 [2021-06-12 20:01:27,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,574 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 28 treesize of output 22 [2021-06-12 20:01:27,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,578 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 [2021-06-12 20:01:27,579 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:27,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:27,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,587 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:27,587 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,590 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 18 treesize of output 14 [2021-06-12 20:01:27,591 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:27,594 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,656 INFO L628 ElimStorePlain]: treesize reduction 61, result has 58.5 percent of original size [2021-06-12 20:01:27,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:27,659 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 [2021-06-12 20:01:27,660 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,662 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 21 treesize of output 7 [2021-06-12 20:01:27,663 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:27,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:27,690 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:359, output treesize:64 [2021-06-12 20:01:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472090819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:27,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:01:27,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686628896] [2021-06-12 20:01:27,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:27,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:27,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:27,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:27,811 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) [2021-06-12 20:01:28,197 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-12 20:01:28,370 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-12 20:01:28,518 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-12 20:01:28,723 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-06-12 20:01:28,872 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2021-06-12 20:01:29,076 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-12 20:01:29,265 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-12 20:01:29,490 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2021-06-12 20:01:29,679 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-06-12 20:01:29,872 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2021-06-12 20:01:30,081 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-06-12 20:01:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:30,151 INFO L93 Difference]: Finished difference Result 564 states and 1708 transitions. [2021-06-12 20:01:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:30,151 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 [2021-06-12 20:01:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:30,152 INFO L225 Difference]: With dead ends: 564 [2021-06-12 20:01:30,152 INFO L226 Difference]: Without dead ends: 558 [2021-06-12 20:01:30,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2248.5ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:01:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-12 20:01:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 372. [2021-06-12 20:01:30,156 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) [2021-06-12 20:01:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1187 transitions. [2021-06-12 20:01:30,156 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1187 transitions. Word has length 18 [2021-06-12 20:01:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:30,157 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1187 transitions. [2021-06-12 20:01:30,157 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) [2021-06-12 20:01:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1187 transitions. [2021-06-12 20:01:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:30,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:30,157 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:30,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6930,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:30,358 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:30,358 INFO L82 PathProgramCache]: Analyzing trace with hash 903035708, now seen corresponding path program 255 times [2021-06-12 20:01:30,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:30,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289280325] [2021-06-12 20:01:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:30,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289280325] [2021-06-12 20:01:30,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289280325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332315653] [2021-06-12 20:01:30,465 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 [2021-06-12 20:01:30,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:01:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:30,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:30,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,624 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 16 treesize of output 12 [2021-06-12 20:01:30,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,626 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 15 treesize of output 11 [2021-06-12 20:01:30,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,629 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 [2021-06-12 20:01:30,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,632 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 26 treesize of output 20 [2021-06-12 20:01:30,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,635 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 15 treesize of output 11 [2021-06-12 20:01:30,635 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,680 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-12 20:01:30,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:30,681 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-06-12 20:01:30,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,814 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 25 treesize of output 19 [2021-06-12 20:01:30,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,817 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 27 treesize of output 21 [2021-06-12 20:01:30,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:30,838 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 20:01:30,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:01:30,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:30,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:30,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 20:01:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332315653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:30,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:01:30,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508887047] [2021-06-12 20:01:30,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:30,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:30,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:30,866 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) [2021-06-12 20:01:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:31,234 INFO L93 Difference]: Finished difference Result 484 states and 1467 transitions. [2021-06-12 20:01:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:31,234 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 [2021-06-12 20:01:31,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:31,235 INFO L225 Difference]: With dead ends: 484 [2021-06-12 20:01:31,235 INFO L226 Difference]: Without dead ends: 478 [2021-06-12 20:01:31,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:31,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-12 20:01:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 380. [2021-06-12 20:01:31,238 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) [2021-06-12 20:01:31,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1212 transitions. [2021-06-12 20:01:31,239 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1212 transitions. Word has length 18 [2021-06-12 20:01:31,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:31,239 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1212 transitions. [2021-06-12 20:01:31,239 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) [2021-06-12 20:01:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1212 transitions. [2021-06-12 20:01:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:31,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:31,240 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:31,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6944,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:31,440 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:31,440 INFO L82 PathProgramCache]: Analyzing trace with hash 858781830, now seen corresponding path program 256 times [2021-06-12 20:01:31,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:31,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742863164] [2021-06-12 20:01:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:31,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:31,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742863164] [2021-06-12 20:01:31,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742863164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840725909] [2021-06-12 20:01:31,556 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 [2021-06-12 20:01:31,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:31,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:31,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:31,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:31,719 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 19 treesize of output 15 [2021-06-12 20:01:31,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,723 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 [2021-06-12 20:01:31,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,726 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 27 treesize of output 21 [2021-06-12 20:01:31,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:31,729 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 27 treesize of output 21 [2021-06-12 20:01:31,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:31,733 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 15 treesize of output 11 [2021-06-12 20:01:31,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:31,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:31,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,743 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 25 treesize of output 19 [2021-06-12 20:01:31,744 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,747 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 17 treesize of output 13 [2021-06-12 20:01:31,747 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,750 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 25 treesize of output 19 [2021-06-12 20:01:31,751 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,824 INFO L628 ElimStorePlain]: treesize reduction 121, result has 51.2 percent of original size [2021-06-12 20:01:31,828 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. [2021-06-12 20:01:31,829 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:287, output treesize:127 [2021-06-12 20:01:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,130 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 15 treesize of output 11 [2021-06-12 20:01:32,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,135 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 [2021-06-12 20:01:32,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,140 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 19 treesize of output 15 [2021-06-12 20:01:32,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,146 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 [2021-06-12 20:01:32,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,151 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 18 treesize of output 14 [2021-06-12 20:01:32,152 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,156 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 16 treesize of output 12 [2021-06-12 20:01:32,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,161 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 25 treesize of output 19 [2021-06-12 20:01:32,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,166 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 16 treesize of output 12 [2021-06-12 20:01:32,167 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,172 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 [2021-06-12 20:01:32,173 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,177 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 28 treesize of output 22 [2021-06-12 20:01:32,178 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,182 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 27 treesize of output 21 [2021-06-12 20:01:32,183 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,187 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 26 treesize of output 20 [2021-06-12 20:01:32,188 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,320 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-06-12 20:01:32,320 INFO L628 ElimStorePlain]: treesize reduction 122, result has 52.0 percent of original size [2021-06-12 20:01:32,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,324 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 20 treesize of output 9 [2021-06-12 20:01:32,325 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:32,328 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 [2021-06-12 20:01:32,328 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:32,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:32,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:01:32,380 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 8 variables, input treesize:405, output treesize:58 [2021-06-12 20:01:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840725909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:32,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:32,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580366702] [2021-06-12 20:01:32,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:32,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:32,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:32,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:32,460 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) [2021-06-12 20:01:33,359 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 94 [2021-06-12 20:01:33,694 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 104 [2021-06-12 20:01:33,859 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-06-12 20:01:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:34,217 INFO L93 Difference]: Finished difference Result 612 states and 1826 transitions. [2021-06-12 20:01:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:01:34,217 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 [2021-06-12 20:01:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:34,218 INFO L225 Difference]: With dead ends: 612 [2021-06-12 20:01:34,218 INFO L226 Difference]: Without dead ends: 575 [2021-06-12 20:01:34,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1580.1ms TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:01:34,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-06-12 20:01:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 406. [2021-06-12 20:01:34,222 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) [2021-06-12 20:01:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1283 transitions. [2021-06-12 20:01:34,223 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1283 transitions. Word has length 18 [2021-06-12 20:01:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:34,223 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1283 transitions. [2021-06-12 20:01:34,223 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) [2021-06-12 20:01:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1283 transitions. [2021-06-12 20:01:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:34,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:34,224 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:34,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6958 [2021-06-12 20:01:34,429 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1046030646, now seen corresponding path program 257 times [2021-06-12 20:01:34,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:34,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723732948] [2021-06-12 20:01:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:34,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723732948] [2021-06-12 20:01:34,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723732948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040462479] [2021-06-12 20:01:34,533 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 [2021-06-12 20:01:34,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:34,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:34,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:34,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:34,658 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 16 treesize of output 12 [2021-06-12 20:01:34,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:34,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:34,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,667 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 25 treesize of output 19 [2021-06-12 20:01:34,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:34,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,672 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 15 treesize of output 11 [2021-06-12 20:01:34,673 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,719 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-12 20:01:34,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:34,719 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-06-12 20:01:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,864 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 27 treesize of output 21 [2021-06-12 20:01:34,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:34,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,867 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 [2021-06-12 20:01:34,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,888 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 20:01:34,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,890 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 21 treesize of output 7 [2021-06-12 20:01:34,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:34,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:34,897 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 20:01:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040462479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:34,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:01:34,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429736157] [2021-06-12 20:01:34,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:34,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:34,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:34,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:34,917 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) [2021-06-12 20:01:35,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:35,268 INFO L93 Difference]: Finished difference Result 487 states and 1493 transitions. [2021-06-12 20:01:35,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:35,268 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 [2021-06-12 20:01:35,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:35,269 INFO L225 Difference]: With dead ends: 487 [2021-06-12 20:01:35,269 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 20:01:35,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 20:01:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 408. [2021-06-12 20:01:35,272 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) [2021-06-12 20:01:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1288 transitions. [2021-06-12 20:01:35,273 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1288 transitions. Word has length 18 [2021-06-12 20:01:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:35,273 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1288 transitions. [2021-06-12 20:01:35,273 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) [2021-06-12 20:01:35,273 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1288 transitions. [2021-06-12 20:01:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:35,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:35,274 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:35,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7012,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:35,474 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 435207224, now seen corresponding path program 258 times [2021-06-12 20:01:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:35,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516071700] [2021-06-12 20:01:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:35,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516071700] [2021-06-12 20:01:35,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516071700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680403161] [2021-06-12 20:01:35,599 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 [2021-06-12 20:01:35,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:01:35,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:35,733 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 16 treesize of output 12 [2021-06-12 20:01:35,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:35,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:35,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,741 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 [2021-06-12 20:01:35,742 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:35,745 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,747 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 [2021-06-12 20:01:35,748 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,793 INFO L628 ElimStorePlain]: treesize reduction 46, result has 60.0 percent of original size [2021-06-12 20:01:35,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:35,794 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:175, output treesize:69 [2021-06-12 20:01:35,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,882 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 25 treesize of output 19 [2021-06-12 20:01:35,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,886 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 [2021-06-12 20:01:35,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,891 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 15 treesize of output 11 [2021-06-12 20:01:35,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,895 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 17 treesize of output 13 [2021-06-12 20:01:35,895 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:35,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:35,901 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,904 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 [2021-06-12 20:01:35,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,954 INFO L628 ElimStorePlain]: treesize reduction 57, result has 56.8 percent of original size [2021-06-12 20:01:35,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,957 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 11 treesize of output 3 [2021-06-12 20:01:35,957 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:35,959 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 21 treesize of output 7 [2021-06-12 20:01:35,960 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:35,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:35,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:35,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:35,987 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:194, output treesize:53 [2021-06-12 20:01:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680403161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:36,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:01:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314520375] [2021-06-12 20:01:36,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:36,050 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) [2021-06-12 20:01:36,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:36,510 INFO L93 Difference]: Finished difference Result 486 states and 1491 transitions. [2021-06-12 20:01:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:36,510 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 [2021-06-12 20:01:36,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:36,511 INFO L225 Difference]: With dead ends: 486 [2021-06-12 20:01:36,511 INFO L226 Difference]: Without dead ends: 478 [2021-06-12 20:01:36,511 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-06-12 20:01:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 403. [2021-06-12 20:01:36,515 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) [2021-06-12 20:01:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1276 transitions. [2021-06-12 20:01:36,515 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1276 transitions. Word has length 18 [2021-06-12 20:01:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:36,515 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1276 transitions. [2021-06-12 20:01:36,516 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) [2021-06-12 20:01:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1276 transitions. [2021-06-12 20:01:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:36,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:36,516 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:36,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7026 [2021-06-12 20:01:36,717 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2119116026, now seen corresponding path program 259 times [2021-06-12 20:01:36,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:36,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919308931] [2021-06-12 20:01:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919308931] [2021-06-12 20:01:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919308931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701456000] [2021-06-12 20:01:36,924 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 [2021-06-12 20:01:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:36,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:36,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:37,083 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 15 treesize of output 11 [2021-06-12 20:01:37,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,086 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 16 treesize of output 12 [2021-06-12 20:01:37,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:37,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,091 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 16 treesize of output 12 [2021-06-12 20:01:37,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:37,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,097 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 26 treesize of output 20 [2021-06-12 20:01:37,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,153 INFO L628 ElimStorePlain]: treesize reduction 55, result has 60.4 percent of original size [2021-06-12 20:01:37,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:37,154 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:199, output treesize:84 [2021-06-12 20:01:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,299 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 27 treesize of output 21 [2021-06-12 20:01:37,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:37,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,303 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 [2021-06-12 20:01:37,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,343 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-12 20:01:37,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,346 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 [2021-06-12 20:01:37,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,349 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 11 treesize of output 3 [2021-06-12 20:01:37,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:37,373 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:37,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:37,386 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1799 vanished before elimination [2021-06-12 20:01:37,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:37,387 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 20:01:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:37,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701456000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:37,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482364611] [2021-06-12 20:01:37,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:37,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:37,410 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) [2021-06-12 20:01:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:38,325 INFO L93 Difference]: Finished difference Result 487 states and 1506 transitions. [2021-06-12 20:01:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:01:38,326 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 [2021-06-12 20:01:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:38,326 INFO L225 Difference]: With dead ends: 487 [2021-06-12 20:01:38,327 INFO L226 Difference]: Without dead ends: 475 [2021-06-12 20:01:38,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:01:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-12 20:01:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 409. [2021-06-12 20:01:38,333 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) [2021-06-12 20:01:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1297 transitions. [2021-06-12 20:01:38,334 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1297 transitions. Word has length 18 [2021-06-12 20:01:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:38,334 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1297 transitions. [2021-06-12 20:01:38,334 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) [2021-06-12 20:01:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1297 transitions. [2021-06-12 20:01:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:38,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:38,335 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:38,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7038,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:38,557 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:38,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:38,557 INFO L82 PathProgramCache]: Analyzing trace with hash 567267000, now seen corresponding path program 260 times [2021-06-12 20:01:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:38,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816633186] [2021-06-12 20:01:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:38,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:38,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:38,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816633186] [2021-06-12 20:01:38,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816633186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690459986] [2021-06-12 20:01:38,709 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 [2021-06-12 20:01:38,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:38,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:38,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:38,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,881 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 17 treesize of output 13 [2021-06-12 20:01:38,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,884 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 27 treesize of output 21 [2021-06-12 20:01:38,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:38,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:38,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,891 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 25 treesize of output 19 [2021-06-12 20:01:38,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:38,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,898 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 [2021-06-12 20:01:38,899 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,978 INFO L628 ElimStorePlain]: treesize reduction 46, result has 75.5 percent of original size [2021-06-12 20:01:38,983 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. [2021-06-12 20:01:38,984 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:221, output treesize:142 [2021-06-12 20:01:39,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,219 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 15 treesize of output 11 [2021-06-12 20:01:39,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,224 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 [2021-06-12 20:01:39,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:39,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,233 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 [2021-06-12 20:01:39,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,238 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 18 treesize of output 14 [2021-06-12 20:01:39,239 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,243 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 27 treesize of output 21 [2021-06-12 20:01:39,244 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,248 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 16 treesize of output 12 [2021-06-12 20:01:39,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,253 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 16 treesize of output 12 [2021-06-12 20:01:39,254 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,258 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 [2021-06-12 20:01:39,259 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,263 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 [2021-06-12 20:01:39,264 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,268 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 26 treesize of output 20 [2021-06-12 20:01:39,269 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,273 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 25 treesize of output 19 [2021-06-12 20:01:39,273 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,385 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-12 20:01:39,385 INFO L628 ElimStorePlain]: treesize reduction 122, result has 49.2 percent of original size [2021-06-12 20:01:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,389 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 20 treesize of output 9 [2021-06-12 20:01:39,389 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,392 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 10 treesize of output 5 [2021-06-12 20:01:39,393 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:39,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 20:01:39,434 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 7 variables, input treesize:405, output treesize:50 [2021-06-12 20:01:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:39,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690459986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:39,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:39,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009623736] [2021-06-12 20:01:39,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:39,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:39,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:39,509 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) [2021-06-12 20:01:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,553 INFO L93 Difference]: Finished difference Result 514 states and 1557 transitions. [2021-06-12 20:01:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:01:40,553 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 [2021-06-12 20:01:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,554 INFO L225 Difference]: With dead ends: 514 [2021-06-12 20:01:40,554 INFO L226 Difference]: Without dead ends: 485 [2021-06-12 20:01:40,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:01:40,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-12 20:01:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 417. [2021-06-12 20:01:40,558 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) [2021-06-12 20:01:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1321 transitions. [2021-06-12 20:01:40,559 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1321 transitions. Word has length 18 [2021-06-12 20:01:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,559 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1321 transitions. [2021-06-12 20:01:40,559 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) [2021-06-12 20:01:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1321 transitions. [2021-06-12 20:01:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:40,559 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,559 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:40,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7052,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:40,760 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:40,760 INFO L82 PathProgramCache]: Analyzing trace with hash -637878156, now seen corresponding path program 261 times [2021-06-12 20:01:40,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:40,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974842247] [2021-06-12 20:01:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:40,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974842247] [2021-06-12 20:01:40,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974842247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229600808] [2021-06-12 20:01:40,885 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 [2021-06-12 20:01:40,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:01:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:40,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:41,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:41,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:41,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,093 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 16 treesize of output 12 [2021-06-12 20:01:41,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,097 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 16 treesize of output 12 [2021-06-12 20:01:41,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,101 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 25 treesize of output 19 [2021-06-12 20:01:41,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:41,106 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,168 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:01:41,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:41,169 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:193, output treesize:81 [2021-06-12 20:01:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,223 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 25 treesize of output 19 [2021-06-12 20:01:41,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,227 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 [2021-06-12 20:01:41,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:41,288 INFO L628 ElimStorePlain]: treesize reduction 92, result has 49.2 percent of original size [2021-06-12 20:01:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:41,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,315 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1805 vanished before elimination [2021-06-12 20:01:41,318 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 7 treesize of output 5 [2021-06-12 20:01:41,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1807 vanished before elimination [2021-06-12 20:01:41,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,344 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 11 treesize of output 3 [2021-06-12 20:01:41,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,346 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 [2021-06-12 20:01:41,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:41,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:41,375 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:53 [2021-06-12 20:01:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:41,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229600808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:41,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:01:41,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000832192] [2021-06-12 20:01:41,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:41,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:41,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:41,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:41,437 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) [2021-06-12 20:01:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:41,926 INFO L93 Difference]: Finished difference Result 467 states and 1457 transitions. [2021-06-12 20:01:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:41,926 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 [2021-06-12 20:01:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:41,927 INFO L225 Difference]: With dead ends: 467 [2021-06-12 20:01:41,927 INFO L226 Difference]: Without dead ends: 459 [2021-06-12 20:01:41,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:41,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-12 20:01:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 419. [2021-06-12 20:01:41,930 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) [2021-06-12 20:01:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1326 transitions. [2021-06-12 20:01:41,931 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1326 transitions. Word has length 18 [2021-06-12 20:01:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:41,931 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1326 transitions. [2021-06-12 20:01:41,931 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) [2021-06-12 20:01:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1326 transitions. [2021-06-12 20:01:41,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:41,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:41,932 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:42,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7100 [2021-06-12 20:01:42,132 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1954035460, now seen corresponding path program 262 times [2021-06-12 20:01:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:42,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778336334] [2021-06-12 20:01:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:42,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:42,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778336334] [2021-06-12 20:01:42,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778336334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506720768] [2021-06-12 20:01:42,274 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 [2021-06-12 20:01:42,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:42,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:42,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:42,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,531 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 27 treesize of output 21 [2021-06-12 20:01:42,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:42,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,535 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 [2021-06-12 20:01:42,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,606 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 17 treesize of output 13 [2021-06-12 20:01:42,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,610 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 15 treesize of output 11 [2021-06-12 20:01:42,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,672 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 17 treesize of output 13 [2021-06-12 20:01:42,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,676 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 15 treesize of output 11 [2021-06-12 20:01:42,677 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:42,737 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. [2021-06-12 20:01:42,737 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:191, output treesize:167 [2021-06-12 20:01:42,902 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 15=[array_2]} [2021-06-12 20:01:42,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,907 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 28 treesize of output 22 [2021-06-12 20:01:42,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,912 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 [2021-06-12 20:01:42,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,918 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 19 treesize of output 15 [2021-06-12 20:01:42,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,923 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 18 treesize of output 14 [2021-06-12 20:01:42,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,928 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 20 treesize of output 16 [2021-06-12 20:01:42,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,934 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 [2021-06-12 20:01:42,934 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,939 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 29 treesize of output 23 [2021-06-12 20:01:42,940 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,944 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 15 treesize of output 11 [2021-06-12 20:01:42,945 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,949 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 [2021-06-12 20:01:42,950 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,955 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 16 treesize of output 12 [2021-06-12 20:01:42,955 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,960 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 17 treesize of output 13 [2021-06-12 20:01:42,960 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,964 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 26 treesize of output 20 [2021-06-12 20:01:42,965 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,108 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-06-12 20:01:43,109 INFO L628 ElimStorePlain]: treesize reduction 120, result has 57.7 percent of original size [2021-06-12 20:01:43,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,113 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 11 treesize of output 3 [2021-06-12 20:01:43,114 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,118 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 21 treesize of output 7 [2021-06-12 20:01:43,118 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,122 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 9 treesize of output 3 [2021-06-12 20:01:43,122 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:43,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 20:01:43,186 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 7 variables, input treesize:429, output treesize:85 [2021-06-12 20:01:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:43,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506720768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:43,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:43,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951451495] [2021-06-12 20:01:43,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:43,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:43,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:43,282 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) [2021-06-12 20:01:44,227 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2021-06-12 20:01:44,363 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-06-12 20:01:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:44,641 INFO L93 Difference]: Finished difference Result 518 states and 1588 transitions. [2021-06-12 20:01:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:01:44,642 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 [2021-06-12 20:01:44,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:44,642 INFO L225 Difference]: With dead ends: 518 [2021-06-12 20:01:44,642 INFO L226 Difference]: Without dead ends: 502 [2021-06-12 20:01:44,643 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1319.2ms TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:44,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-06-12 20:01:44,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 425. [2021-06-12 20:01:44,646 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) [2021-06-12 20:01:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1353 transitions. [2021-06-12 20:01:44,647 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1353 transitions. Word has length 18 [2021-06-12 20:01:44,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:44,647 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1353 transitions. [2021-06-12 20:01:44,647 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) [2021-06-12 20:01:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1353 transitions. [2021-06-12 20:01:44,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:44,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:44,648 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:44,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7112 [2021-06-12 20:01:44,848 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash -758999286, now seen corresponding path program 263 times [2021-06-12 20:01:44,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:44,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475142989] [2021-06-12 20:01:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:45,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:45,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475142989] [2021-06-12 20:01:45,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475142989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74717264] [2021-06-12 20:01:45,021 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 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 [2021-06-12 20:01:45,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:45,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,282 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 16 treesize of output 12 [2021-06-12 20:01:45,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:01:45,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,292 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 15 treesize of output 11 [2021-06-12 20:01:45,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,297 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 26 treesize of output 20 [2021-06-12 20:01:45,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,302 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 16 treesize of output 12 [2021-06-12 20:01:45,303 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,306 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 [2021-06-12 20:01:45,307 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,449 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 20:01:45,449 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-06-12 20:01:45,454 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. [2021-06-12 20:01:45,454 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:243, output treesize:173 [2021-06-12 20:01:45,675 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1827, array_4], 6=[v_prenex_1826, array_2]} [2021-06-12 20:01:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,681 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 [2021-06-12 20:01:45,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:45,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,692 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 [2021-06-12 20:01:45,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,765 INFO L628 ElimStorePlain]: treesize reduction 172, result has 36.3 percent of original size [2021-06-12 20:01:45,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,768 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 27 treesize of output 21 [2021-06-12 20:01:45,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:45,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,803 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1826 vanished before elimination [2021-06-12 20:01:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,807 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 20 treesize of output 9 [2021-06-12 20:01:45,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:45,810 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 10 treesize of output 5 [2021-06-12 20:01:45,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:45,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:45,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:45,851 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:291, output treesize:54 [2021-06-12 20:01:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:45,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74717264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:45,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:45,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:45,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263676962] [2021-06-12 20:01:45,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:45,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:45,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:45,922 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) [2021-06-12 20:01:46,725 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2021-06-12 20:01:47,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:47,278 INFO L93 Difference]: Finished difference Result 526 states and 1614 transitions. [2021-06-12 20:01:47,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:01:47,278 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 [2021-06-12 20:01:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:47,279 INFO L225 Difference]: With dead ends: 526 [2021-06-12 20:01:47,279 INFO L226 Difference]: Without dead ends: 506 [2021-06-12 20:01:47,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1286.3ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:01:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-12 20:01:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 433. [2021-06-12 20:01:47,283 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) [2021-06-12 20:01:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1383 transitions. [2021-06-12 20:01:47,283 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1383 transitions. Word has length 18 [2021-06-12 20:01:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:47,284 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1383 transitions. [2021-06-12 20:01:47,284 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) [2021-06-12 20:01:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1383 transitions. [2021-06-12 20:01:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:47,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:47,284 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:47,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7141,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:47,485 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:47,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash 722238584, now seen corresponding path program 264 times [2021-06-12 20:01:47,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:47,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589625251] [2021-06-12 20:01:47,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:47,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:47,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589625251] [2021-06-12 20:01:47,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589625251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77150747] [2021-06-12 20:01:47,602 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 [2021-06-12 20:01:47,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:47,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:47,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:47,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,854 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 15 treesize of output 11 [2021-06-12 20:01:47,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,859 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 26 treesize of output 20 [2021-06-12 20:01:47,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,864 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 16 treesize of output 12 [2021-06-12 20:01:47,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,868 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 25 treesize of output 19 [2021-06-12 20:01:47,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,873 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 16 treesize of output 12 [2021-06-12 20:01:47,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,877 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 15 treesize of output 11 [2021-06-12 20:01:47,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,021 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-12 20:01:48,021 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.9 percent of original size [2021-06-12 20:01:48,025 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. [2021-06-12 20:01:48,026 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:243, output treesize:173 [2021-06-12 20:01:48,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,228 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 [2021-06-12 20:01:48,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,232 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 27 treesize of output 21 [2021-06-12 20:01:48,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:48,289 INFO L628 ElimStorePlain]: treesize reduction 78, result has 50.0 percent of original size [2021-06-12 20:01:48,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,293 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 20 treesize of output 9 [2021-06-12 20:01:48,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:48,296 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 10 treesize of output 5 [2021-06-12 20:01:48,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:48,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:48,325 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 [2021-06-12 20:01:48,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:48,343 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:48,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:48,345 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:154, output treesize:22 [2021-06-12 20:01:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:48,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77150747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:48,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:48,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012906450] [2021-06-12 20:01:48,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:48,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:48,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:48,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:48,376 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) [2021-06-12 20:01:49,099 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2021-06-12 20:01:49,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:49,780 INFO L93 Difference]: Finished difference Result 521 states and 1625 transitions. [2021-06-12 20:01:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:01:49,781 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 [2021-06-12 20:01:49,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:49,782 INFO L225 Difference]: With dead ends: 521 [2021-06-12 20:01:49,782 INFO L226 Difference]: Without dead ends: 507 [2021-06-12 20:01:49,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1281.2ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:01:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-12 20:01:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 426. [2021-06-12 20:01:49,786 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) [2021-06-12 20:01:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1366 transitions. [2021-06-12 20:01:49,786 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1366 transitions. Word has length 18 [2021-06-12 20:01:49,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:49,786 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1366 transitions. [2021-06-12 20:01:49,786 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) [2021-06-12 20:01:49,786 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1366 transitions. [2021-06-12 20:01:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:49,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:49,787 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:49,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7167 [2021-06-12 20:01:49,987 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:49,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1742014878, now seen corresponding path program 265 times [2021-06-12 20:01:49,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:49,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609693414] [2021-06-12 20:01:49,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:50,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609693414] [2021-06-12 20:01:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609693414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869327640] [2021-06-12 20:01:50,084 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 [2021-06-12 20:01:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:50,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,156 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 15 treesize of output 11 [2021-06-12 20:01:50,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:50,159 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 [2021-06-12 20:01:50,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,161 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 24 treesize of output 18 [2021-06-12 20:01:50,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:50,194 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.6 percent of original size [2021-06-12 20:01:50,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:50,195 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:97, output treesize:48 [2021-06-12 20:01:50,278 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 27 treesize of output 21 [2021-06-12 20:01:50,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:50,288 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 20:01:50,288 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:50,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:50,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 20:01:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:50,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869327640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:50,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:01:50,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403929201] [2021-06-12 20:01:50,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:50,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:50,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:50,306 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) [2021-06-12 20:01:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:50,640 INFO L93 Difference]: Finished difference Result 551 states and 1707 transitions. [2021-06-12 20:01:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:50,640 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 [2021-06-12 20:01:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:50,641 INFO L225 Difference]: With dead ends: 551 [2021-06-12 20:01:50,641 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 20:01:50,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:50,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 20:01:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 430. [2021-06-12 20:01:50,645 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) [2021-06-12 20:01:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1386 transitions. [2021-06-12 20:01:50,646 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1386 transitions. Word has length 18 [2021-06-12 20:01:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:50,646 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1386 transitions. [2021-06-12 20:01:50,646 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) [2021-06-12 20:01:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1386 transitions. [2021-06-12 20:01:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:50,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:50,647 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:50,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7196,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:50,847 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash -885518932, now seen corresponding path program 266 times [2021-06-12 20:01:50,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:50,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470234413] [2021-06-12 20:01:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:50,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:50,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470234413] [2021-06-12 20:01:50,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470234413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:50,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188442467] [2021-06-12 20:01:50,993 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 [2021-06-12 20:01:51,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:51,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:51,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:51,080 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 [2021-06-12 20:01:51,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,083 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 24 treesize of output 18 [2021-06-12 20:01:51,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,086 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 [2021-06-12 20:01:51,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,122 INFO L628 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2021-06-12 20:01:51,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,123 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:109, output treesize:56 [2021-06-12 20:01:51,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:51,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,232 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 20:01:51,232 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:51,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:51,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 20:01:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:51,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188442467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:51,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:01:51,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474093684] [2021-06-12 20:01:51,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:51,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:51,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:51,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:51,251 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) [2021-06-12 20:01:51,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:51,582 INFO L93 Difference]: Finished difference Result 548 states and 1703 transitions. [2021-06-12 20:01:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:51,582 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 [2021-06-12 20:01:51,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:51,583 INFO L225 Difference]: With dead ends: 548 [2021-06-12 20:01:51,583 INFO L226 Difference]: Without dead ends: 543 [2021-06-12 20:01:51,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-12 20:01:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 433. [2021-06-12 20:01:51,587 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) [2021-06-12 20:01:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1398 transitions. [2021-06-12 20:01:51,588 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1398 transitions. Word has length 18 [2021-06-12 20:01:51,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:51,588 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1398 transitions. [2021-06-12 20:01:51,588 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) [2021-06-12 20:01:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1398 transitions. [2021-06-12 20:01:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:51,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:51,588 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:51,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7202 [2021-06-12 20:01:51,789 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1469459618, now seen corresponding path program 267 times [2021-06-12 20:01:51,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:51,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800692774] [2021-06-12 20:01:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:51,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:51,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:51,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800692774] [2021-06-12 20:01:51,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800692774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:51,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732608095] [2021-06-12 20:01:51,892 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 [2021-06-12 20:01:51,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:01:51,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:51,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:51,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,966 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 24 treesize of output 18 [2021-06-12 20:01:51,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:51,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:51,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,010 INFO L628 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2021-06-12 20:01:52,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:52,011 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:109, output treesize:56 [2021-06-12 20:01:52,088 INFO L446 ElimStorePlain]: Different costs {0=[array_0, v_prenex_1839], 1=[array_4, v_prenex_1840]} [2021-06-12 20:01:52,091 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 15 treesize of output 11 [2021-06-12 20:01:52,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:52,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,132 INFO L628 ElimStorePlain]: treesize reduction 84, result has 39.6 percent of original size [2021-06-12 20:01:52,134 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 [2021-06-12 20:01:52,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:52,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,153 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:52,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,155 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 21 treesize of output 7 [2021-06-12 20:01:52,156 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,158 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 11 treesize of output 3 [2021-06-12 20:01:52,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:52,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:52,182 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:153, output treesize:44 [2021-06-12 20:01:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732608095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:52,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:01:52,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815382561] [2021-06-12 20:01:52,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:52,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:52,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:52,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:52,240 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) [2021-06-12 20:01:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:52,610 INFO L93 Difference]: Finished difference Result 554 states and 1727 transitions. [2021-06-12 20:01:52,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:52,610 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 [2021-06-12 20:01:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:52,611 INFO L225 Difference]: With dead ends: 554 [2021-06-12 20:01:52,611 INFO L226 Difference]: Without dead ends: 549 [2021-06-12 20:01:52,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:01:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-12 20:01:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 420. [2021-06-12 20:01:52,615 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) [2021-06-12 20:01:52,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1349 transitions. [2021-06-12 20:01:52,616 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1349 transitions. Word has length 18 [2021-06-12 20:01:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:52,616 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1349 transitions. [2021-06-12 20:01:52,616 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) [2021-06-12 20:01:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1349 transitions. [2021-06-12 20:01:52,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:52,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:52,617 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:52,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7209,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:52,817 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:52,817 INFO L82 PathProgramCache]: Analyzing trace with hash 603886064, now seen corresponding path program 268 times [2021-06-12 20:01:52,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:52,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824487180] [2021-06-12 20:01:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:52,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824487180] [2021-06-12 20:01:52,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824487180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355275273] [2021-06-12 20:01:52,969 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 [2021-06-12 20:01:52,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:52,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:01:52,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:53,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:01:53,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,060 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 [2021-06-12 20:01:53,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,063 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 15 treesize of output 11 [2021-06-12 20:01:53,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,102 INFO L628 ElimStorePlain]: treesize reduction 27, result has 68.2 percent of original size [2021-06-12 20:01:53,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:53,103 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:112, output treesize:58 [2021-06-12 20:01:53,170 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 27 treesize of output 21 [2021-06-12 20:01:53,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:53,180 INFO L628 ElimStorePlain]: treesize reduction 7, result has 61.1 percent of original size [2021-06-12 20:01:53,180 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:53,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:53,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:11 [2021-06-12 20:01:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:53,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355275273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:53,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 20:01:53,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729067639] [2021-06-12 20:01:53,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:01:53,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:01:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:01:53,199 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) [2021-06-12 20:01:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:53,479 INFO L93 Difference]: Finished difference Result 509 states and 1598 transitions. [2021-06-12 20:01:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:53,479 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 [2021-06-12 20:01:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:53,480 INFO L225 Difference]: With dead ends: 509 [2021-06-12 20:01:53,480 INFO L226 Difference]: Without dead ends: 498 [2021-06-12 20:01:53,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-12 20:01:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 432. [2021-06-12 20:01:53,484 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) [2021-06-12 20:01:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1389 transitions. [2021-06-12 20:01:53,485 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1389 transitions. Word has length 18 [2021-06-12 20:01:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:53,485 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1389 transitions. [2021-06-12 20:01:53,485 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) [2021-06-12 20:01:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1389 transitions. [2021-06-12 20:01:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:53,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:53,485 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:53,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7222 [2021-06-12 20:01:53,686 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1336102682, now seen corresponding path program 269 times [2021-06-12 20:01:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394116725] [2021-06-12 20:01:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:53,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:53,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394116725] [2021-06-12 20:01:53,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394116725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:53,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805561335] [2021-06-12 20:01:53,785 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 [2021-06-12 20:01:53,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:53,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:53,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:53,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:01:53,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,892 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 17 treesize of output 13 [2021-06-12 20:01:53,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:53,912 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. [2021-06-12 20:01:53,913 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:67, output treesize:53 [2021-06-12 20:01:53,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,981 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 27 treesize of output 21 [2021-06-12 20:01:53,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:53,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,985 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 [2021-06-12 20:01:53,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,989 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 [2021-06-12 20:01:53,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:53,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:53,993 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 17 treesize of output 13 [2021-06-12 20:01:53,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,066 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 20:01:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,070 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 11 treesize of output 3 [2021-06-12 20:01:54,070 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,073 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 21 treesize of output 7 [2021-06-12 20:01:54,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:54,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:54,083 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 9 treesize of output 3 [2021-06-12 20:01:54,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:54,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:54,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:54,117 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-12 20:01:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:54,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805561335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:54,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:54,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:01:54,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639392300] [2021-06-12 20:01:54,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:54,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:54,193 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) [2021-06-12 20:01:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:54,724 INFO L93 Difference]: Finished difference Result 513 states and 1615 transitions. [2021-06-12 20:01:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:01:54,724 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 [2021-06-12 20:01:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:54,725 INFO L225 Difference]: With dead ends: 513 [2021-06-12 20:01:54,725 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:01:54,725 INFO L728 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 [2021-06-12 20:01:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:01:54,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 426. [2021-06-12 20:01:54,729 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) [2021-06-12 20:01:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1367 transitions. [2021-06-12 20:01:54,730 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1367 transitions. Word has length 18 [2021-06-12 20:01:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:54,730 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1367 transitions. [2021-06-12 20:01:54,730 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) [2021-06-12 20:01:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1367 transitions. [2021-06-12 20:01:54,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:54,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:54,730 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:54,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7231 [2021-06-12 20:01:54,931 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:54,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:54,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2085123934, now seen corresponding path program 270 times [2021-06-12 20:01:54,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:54,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840076809] [2021-06-12 20:01:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:55,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840076809] [2021-06-12 20:01:55,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840076809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124348568] [2021-06-12 20:01:55,037 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 [2021-06-12 20:01:55,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:55,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:55,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:55,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,202 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 [2021-06-12 20:01:55,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,205 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 [2021-06-12 20:01:55,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,236 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. [2021-06-12 20:01:55,236 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:89, output treesize:75 [2021-06-12 20:01:55,300 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 20:01:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,304 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 [2021-06-12 20:01:55,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,309 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 15 treesize of output 11 [2021-06-12 20:01:55,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:55,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,316 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 27 treesize of output 21 [2021-06-12 20:01:55,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:55,378 INFO L628 ElimStorePlain]: treesize reduction 46, result has 65.7 percent of original size [2021-06-12 20:01:55,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,382 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 11 treesize of output 3 [2021-06-12 20:01:55,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,385 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 21 treesize of output 7 [2021-06-12 20:01:55,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:55,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:55,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:181, output treesize:38 [2021-06-12 20:01:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124348568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:55,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:01:55,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242955632] [2021-06-12 20:01:55,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:01:55,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:01:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:01:55,479 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) [2021-06-12 20:01:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:56,002 INFO L93 Difference]: Finished difference Result 521 states and 1641 transitions. [2021-06-12 20:01:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:01:56,002 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 [2021-06-12 20:01:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:56,003 INFO L225 Difference]: With dead ends: 521 [2021-06-12 20:01:56,003 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:01:56,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:01:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 415. [2021-06-12 20:01:56,007 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) [2021-06-12 20:01:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1334 transitions. [2021-06-12 20:01:56,008 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1334 transitions. Word has length 18 [2021-06-12 20:01:56,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:56,008 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1334 transitions. [2021-06-12 20:01:56,008 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) [2021-06-12 20:01:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1334 transitions. [2021-06-12 20:01:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:56,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:56,008 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:56,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7245 [2021-06-12 20:01:56,209 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:56,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1483849440, now seen corresponding path program 271 times [2021-06-12 20:01:56,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:56,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411361126] [2021-06-12 20:01:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:56,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411361126] [2021-06-12 20:01:56,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411361126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259986742] [2021-06-12 20:01:56,367 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 [2021-06-12 20:01:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:56,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:56,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,447 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 [2021-06-12 20:01:56,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,460 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 26 treesize of output 20 [2021-06-12 20:01:56,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,465 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 16 treesize of output 12 [2021-06-12 20:01:56,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,468 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 15 treesize of output 11 [2021-06-12 20:01:56,469 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,532 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:01:56,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:56,533 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-12 20:01:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,754 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 27 treesize of output 21 [2021-06-12 20:01:56,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:56,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,758 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 [2021-06-12 20:01:56,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,799 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-12 20:01:56,802 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 7 treesize of output 5 [2021-06-12 20:01:56,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,817 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:01:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,820 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 [2021-06-12 20:01:56,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,823 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 21 treesize of output 7 [2021-06-12 20:01:56,823 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:56,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:56,844 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 20:01:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259986742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:56,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:56,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717176331] [2021-06-12 20:01:56,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:56,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:56,867 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) [2021-06-12 20:01:57,288 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-06-12 20:01:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:57,620 INFO L93 Difference]: Finished difference Result 586 states and 1779 transitions. [2021-06-12 20:01:57,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:01:57,620 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 [2021-06-12 20:01:57,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:57,621 INFO L225 Difference]: With dead ends: 586 [2021-06-12 20:01:57,621 INFO L226 Difference]: Without dead ends: 580 [2021-06-12 20:01:57,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-12 20:01:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 418. [2021-06-12 20:01:57,626 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) [2021-06-12 20:01:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1341 transitions. [2021-06-12 20:01:57,627 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1341 transitions. Word has length 18 [2021-06-12 20:01:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:57,627 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1341 transitions. [2021-06-12 20:01:57,627 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) [2021-06-12 20:01:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1341 transitions. [2021-06-12 20:01:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:57,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:57,627 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:57,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7256 [2021-06-12 20:01:57,828 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash 862051502, now seen corresponding path program 272 times [2021-06-12 20:01:57,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:57,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84264513] [2021-06-12 20:01:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84264513] [2021-06-12 20:01:58,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84264513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057110276] [2021-06-12 20:01:58,096 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 [2021-06-12 20:01:58,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:58,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:58,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:01:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:58,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,178 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 16 treesize of output 12 [2021-06-12 20:01:58,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,181 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 [2021-06-12 20:01:58,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,184 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 25 treesize of output 19 [2021-06-12 20:01:58,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,187 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 15 treesize of output 11 [2021-06-12 20:01:58,188 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,252 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-12 20:01:58,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:01:58,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-12 20:01:58,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,473 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 27 treesize of output 21 [2021-06-12 20:01:58,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:01:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,477 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 25 treesize of output 19 [2021-06-12 20:01:58,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,498 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 20:01:58,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:58,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:01:58,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:01:58,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:58,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 20:01:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057110276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:58,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:01:58,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039358321] [2021-06-12 20:01:58,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:01:58,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:01:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:01:58,529 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) [2021-06-12 20:01:58,943 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2021-06-12 20:01:59,105 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2021-06-12 20:01:59,293 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2021-06-12 20:01:59,532 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-12 20:01:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:59,872 INFO L93 Difference]: Finished difference Result 645 states and 1951 transitions. [2021-06-12 20:01:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:01:59,872 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 [2021-06-12 20:01:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:59,873 INFO L225 Difference]: With dead ends: 645 [2021-06-12 20:01:59,873 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 20:01:59,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1339.8ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:01:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 20:01:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 429. [2021-06-12 20:01:59,878 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) [2021-06-12 20:01:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1385 transitions. [2021-06-12 20:01:59,879 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1385 transitions. Word has length 18 [2021-06-12 20:01:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:59,879 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1385 transitions. [2021-06-12 20:01:59,879 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) [2021-06-12 20:01:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1385 transitions. [2021-06-12 20:01:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:01:59,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:59,879 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:00,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7269 [2021-06-12 20:02:00,080 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -746532768, now seen corresponding path program 273 times [2021-06-12 20:02:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:00,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270867910] [2021-06-12 20:02:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:00,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270867910] [2021-06-12 20:02:00,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270867910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:00,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413981071] [2021-06-12 20:02:00,242 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 [2021-06-12 20:02:00,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:00,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:00,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:00,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,327 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 34 treesize of output 26 [2021-06-12 20:02:00,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,330 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 35 treesize of output 27 [2021-06-12 20:02:00,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:00,334 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 [2021-06-12 20:02:00,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:00,338 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,341 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 24 treesize of output 18 [2021-06-12 20:02:00,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,449 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 20:02:00,449 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-06-12 20:02:00,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:00,451 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-12 20:02:00,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,938 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 [2021-06-12 20:02:00,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,944 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 16 treesize of output 12 [2021-06-12 20:02:00,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,949 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 [2021-06-12 20:02:00,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,955 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 25 treesize of output 19 [2021-06-12 20:02:00,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,961 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 [2021-06-12 20:02:00,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,980 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 28 treesize of output 22 [2021-06-12 20:02:00,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,990 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 27 treesize of output 21 [2021-06-12 20:02:00,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:00,998 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 25 treesize of output 19 [2021-06-12 20:02:00,999 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,006 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 27 treesize of output 21 [2021-06-12 20:02:01,007 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,012 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 26 treesize of output 20 [2021-06-12 20:02:01,013 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,018 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 28 treesize of output 22 [2021-06-12 20:02:01,019 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,024 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 15 treesize of output 11 [2021-06-12 20:02:01,025 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,036 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 26 treesize of output 20 [2021-06-12 20:02:01,037 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,041 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 28 treesize of output 22 [2021-06-12 20:02:01,042 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,192 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-12 20:02:01,193 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 20:02:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,197 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 20 treesize of output 9 [2021-06-12 20:02:01,198 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:01,201 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 20 treesize of output 9 [2021-06-12 20:02:01,202 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:01,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:01,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:02:01,258 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 20:02:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413981071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:01,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:01,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916596467] [2021-06-12 20:02:01,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:01,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:01,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:01,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:01,343 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) [2021-06-12 20:02:01,884 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-12 20:02:02,195 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 103 [2021-06-12 20:02:02,434 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-06-12 20:02:02,807 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 130 [2021-06-12 20:02:03,103 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 112 [2021-06-12 20:02:03,341 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-12 20:02:03,754 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 139 [2021-06-12 20:02:04,064 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2021-06-12 20:02:04,392 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 119 [2021-06-12 20:02:04,595 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-12 20:02:04,941 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 119 [2021-06-12 20:02:05,207 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2021-06-12 20:02:05,482 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 109 [2021-06-12 20:02:05,674 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-12 20:02:05,973 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 99 [2021-06-12 20:02:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:06,023 INFO L93 Difference]: Finished difference Result 651 states and 1990 transitions. [2021-06-12 20:02:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:06,023 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 [2021-06-12 20:02:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:06,025 INFO L225 Difference]: With dead ends: 651 [2021-06-12 20:02:06,025 INFO L226 Difference]: Without dead ends: 622 [2021-06-12 20:02:06,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 4500.7ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:02:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-12 20:02:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 426. [2021-06-12 20:02:06,032 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) [2021-06-12 20:02:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1373 transitions. [2021-06-12 20:02:06,033 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1373 transitions. Word has length 18 [2021-06-12 20:02:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:06,033 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1373 transitions. [2021-06-12 20:02:06,033 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) [2021-06-12 20:02:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1373 transitions. [2021-06-12 20:02:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:06,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:06,034 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:06,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7282,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:06,249 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:06,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1951677924, now seen corresponding path program 274 times [2021-06-12 20:02:06,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:06,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671771106] [2021-06-12 20:02:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:06,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671771106] [2021-06-12 20:02:06,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671771106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295469970] [2021-06-12 20:02:06,430 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 [2021-06-12 20:02:06,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:06,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:06,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:06,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,513 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 26 treesize of output 20 [2021-06-12 20:02:06,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,517 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 [2021-06-12 20:02:06,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,520 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 16 treesize of output 12 [2021-06-12 20:02:06,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,523 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 25 treesize of output 19 [2021-06-12 20:02:06,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,590 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:02:06,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:06,591 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-12 20:02:06,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,754 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 [2021-06-12 20:02:06,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,758 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 27 treesize of output 21 [2021-06-12 20:02:06,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:06,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,762 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 [2021-06-12 20:02:06,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:06,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,769 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 17 treesize of output 13 [2021-06-12 20:02:06,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,772 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 15 treesize of output 11 [2021-06-12 20:02:06,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,776 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 15 treesize of output 11 [2021-06-12 20:02:06,776 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,829 INFO L628 ElimStorePlain]: treesize reduction 81, result has 49.1 percent of original size [2021-06-12 20:02:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,832 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 11 treesize of output 3 [2021-06-12 20:02:06,832 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,835 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 [2021-06-12 20:02:06,835 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:06,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:06,863 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:200, output treesize:56 [2021-06-12 20:02:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295469970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:06,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517988678] [2021-06-12 20:02:06,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:06,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:06,928 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) [2021-06-12 20:02:07,393 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-12 20:02:07,535 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-06-12 20:02:07,739 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-06-12 20:02:07,889 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-06-12 20:02:08,037 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-12 20:02:08,256 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-06-12 20:02:08,413 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-12 20:02:08,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:08,591 INFO L93 Difference]: Finished difference Result 624 states and 1899 transitions. [2021-06-12 20:02:08,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:02:08,591 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 [2021-06-12 20:02:08,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:08,592 INFO L225 Difference]: With dead ends: 624 [2021-06-12 20:02:08,592 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:02:08,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1593.7ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:08,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:02:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 429. [2021-06-12 20:02:08,597 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) [2021-06-12 20:02:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-06-12 20:02:08,597 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-06-12 20:02:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:08,597 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-06-12 20:02:08,597 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) [2021-06-12 20:02:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-06-12 20:02:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:08,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:08,598 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:08,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7312 [2021-06-12 20:02:08,798 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:08,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1063225658, now seen corresponding path program 275 times [2021-06-12 20:02:08,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:08,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606179101] [2021-06-12 20:02:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:08,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606179101] [2021-06-12 20:02:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606179101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343186961] [2021-06-12 20:02:08,966 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 [2021-06-12 20:02:08,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:08,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:09,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,053 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 25 treesize of output 19 [2021-06-12 20:02:09,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:02:09,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,060 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 26 treesize of output 20 [2021-06-12 20:02:09,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,064 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 [2021-06-12 20:02:09,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,067 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 15 treesize of output 11 [2021-06-12 20:02:09,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,070 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 24 treesize of output 18 [2021-06-12 20:02:09,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,131 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:02:09,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:09,132 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:09,371 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1860], 1=[v_prenex_1859, array_0]} [2021-06-12 20:02:09,374 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 [2021-06-12 20:02:09,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:09,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:09,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,418 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 20:02:09,420 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 7 treesize of output 5 [2021-06-12 20:02:09,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,436 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1859 vanished before elimination [2021-06-12 20:02:09,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,438 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 11 treesize of output 3 [2021-06-12 20:02:09,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:09,441 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 21 treesize of output 7 [2021-06-12 20:02:09,441 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:09,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:09,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:09,462 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:02:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:09,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343186961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:09,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:09,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:09,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430329869] [2021-06-12 20:02:09,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:09,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:09,483 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) [2021-06-12 20:02:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:10,165 INFO L93 Difference]: Finished difference Result 593 states and 1821 transitions. [2021-06-12 20:02:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:10,166 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 [2021-06-12 20:02:10,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:10,167 INFO L225 Difference]: With dead ends: 593 [2021-06-12 20:02:10,167 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:02:10,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:02:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 434. [2021-06-12 20:02:10,172 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) [2021-06-12 20:02:10,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1411 transitions. [2021-06-12 20:02:10,172 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1411 transitions. Word has length 18 [2021-06-12 20:02:10,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:10,172 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1411 transitions. [2021-06-12 20:02:10,172 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) [2021-06-12 20:02:10,172 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1411 transitions. [2021-06-12 20:02:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:10,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:10,173 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:10,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7323,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:10,373 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1919721604, now seen corresponding path program 276 times [2021-06-12 20:02:10,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:10,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168044546] [2021-06-12 20:02:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:10,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:10,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168044546] [2021-06-12 20:02:10,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168044546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:10,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636657213] [2021-06-12 20:02:10,527 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 [2021-06-12 20:02:10,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:10,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,608 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 [2021-06-12 20:02:10,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,612 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 16 treesize of output 12 [2021-06-12 20:02:10,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,615 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 26 treesize of output 20 [2021-06-12 20:02:10,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,619 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 25 treesize of output 19 [2021-06-12 20:02:10,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,622 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 [2021-06-12 20:02:10,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,625 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 24 treesize of output 18 [2021-06-12 20:02:10,626 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,686 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:02:10,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:10,687 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:10,958 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1865], 1=[array_0, v_prenex_1864]} [2021-06-12 20:02:10,961 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 27 treesize of output 21 [2021-06-12 20:02:10,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:10,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:10,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,004 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 20:02:11,006 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 7 treesize of output 5 [2021-06-12 20:02:11,007 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,024 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 21 treesize of output 7 [2021-06-12 20:02:11,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,027 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 11 treesize of output 3 [2021-06-12 20:02:11,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:11,047 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1864 vanished before elimination [2021-06-12 20:02:11,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:11,048 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:02:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:11,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636657213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:11,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:11,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349957347] [2021-06-12 20:02:11,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:11,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:11,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:11,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:11,071 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) [2021-06-12 20:02:11,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:11,816 INFO L93 Difference]: Finished difference Result 589 states and 1822 transitions. [2021-06-12 20:02:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:11,816 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 [2021-06-12 20:02:11,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:11,818 INFO L225 Difference]: With dead ends: 589 [2021-06-12 20:02:11,818 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 20:02:11,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 790.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 20:02:11,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 437. [2021-06-12 20:02:11,823 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) [2021-06-12 20:02:11,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1423 transitions. [2021-06-12 20:02:11,824 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1423 transitions. Word has length 18 [2021-06-12 20:02:11,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:11,824 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 1423 transitions. [2021-06-12 20:02:11,824 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) [2021-06-12 20:02:11,824 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1423 transitions. [2021-06-12 20:02:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:11,824 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:11,824 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:12,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7340 [2021-06-12 20:02:12,025 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:12,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:12,025 INFO L82 PathProgramCache]: Analyzing trace with hash -20267142, now seen corresponding path program 277 times [2021-06-12 20:02:12,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:12,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256577117] [2021-06-12 20:02:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:12,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256577117] [2021-06-12 20:02:12,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256577117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809764059] [2021-06-12 20:02:12,180 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 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 [2021-06-12 20:02:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:12,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:12,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:12,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,270 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 25 treesize of output 19 [2021-06-12 20:02:12,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,274 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 16 treesize of output 12 [2021-06-12 20:02:12,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,278 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 26 treesize of output 20 [2021-06-12 20:02:12,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:02:12,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,285 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 15 treesize of output 11 [2021-06-12 20:02:12,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,288 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 24 treesize of output 18 [2021-06-12 20:02:12,289 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,349 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:02:12,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:12,350 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:12,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,562 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 25 treesize of output 19 [2021-06-12 20:02:12,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,565 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 35 treesize of output 27 [2021-06-12 20:02:12,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:12,633 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-06-12 20:02:12,636 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 [2021-06-12 20:02:12,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:12,661 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 [2021-06-12 20:02:12,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,664 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 21 treesize of output 7 [2021-06-12 20:02:12,664 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:12,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:12,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1870 vanished before elimination [2021-06-12 20:02:12,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:12,693 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-06-12 20:02:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809764059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:12,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394747284] [2021-06-12 20:02:12,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:12,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:12,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:12,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:12,758 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) [2021-06-12 20:02:13,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:13,546 INFO L93 Difference]: Finished difference Result 606 states and 1865 transitions. [2021-06-12 20:02:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:13,546 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 [2021-06-12 20:02:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:13,547 INFO L225 Difference]: With dead ends: 606 [2021-06-12 20:02:13,547 INFO L226 Difference]: Without dead ends: 601 [2021-06-12 20:02:13,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 793.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:13,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-12 20:02:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-06-12 20:02:13,552 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) [2021-06-12 20:02:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-06-12 20:02:13,553 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-06-12 20:02:13,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:13,553 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-06-12 20:02:13,553 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) [2021-06-12 20:02:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-06-12 20:02:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:13,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:13,553 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:13,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7358,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:13,754 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:13,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:13,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1764290236, now seen corresponding path program 278 times [2021-06-12 20:02:13,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:13,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757105168] [2021-06-12 20:02:13,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:13,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757105168] [2021-06-12 20:02:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757105168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78632458] [2021-06-12 20:02:13,893 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 [2021-06-12 20:02:13,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:13,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:13,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:13,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,973 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 [2021-06-12 20:02:13,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,976 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 26 treesize of output 20 [2021-06-12 20:02:13,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,980 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 16 treesize of output 12 [2021-06-12 20:02:13,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,982 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 15 treesize of output 11 [2021-06-12 20:02:13,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,046 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.8 percent of original size [2021-06-12 20:02:14,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:14,047 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:141, output treesize:91 [2021-06-12 20:02:14,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,239 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 25 treesize of output 19 [2021-06-12 20:02:14,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,241 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 27 treesize of output 21 [2021-06-12 20:02:14,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:14,262 INFO L628 ElimStorePlain]: treesize reduction 41, result has 43.1 percent of original size [2021-06-12 20:02:14,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:14,264 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 21 treesize of output 7 [2021-06-12 20:02:14,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:14,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:14,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:14,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:68, output treesize:11 [2021-06-12 20:02:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:14,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78632458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:14,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:14,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:02:14,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438498792] [2021-06-12 20:02:14,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:14,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:14,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:14,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:14,303 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) [2021-06-12 20:02:14,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:14,908 INFO L93 Difference]: Finished difference Result 616 states and 1895 transitions. [2021-06-12 20:02:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:14,908 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 [2021-06-12 20:02:14,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:14,909 INFO L225 Difference]: With dead ends: 616 [2021-06-12 20:02:14,909 INFO L226 Difference]: Without dead ends: 610 [2021-06-12 20:02:14,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-06-12 20:02:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 433. [2021-06-12 20:02:14,914 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) [2021-06-12 20:02:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1407 transitions. [2021-06-12 20:02:14,914 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1407 transitions. Word has length 18 [2021-06-12 20:02:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:14,915 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1407 transitions. [2021-06-12 20:02:14,915 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) [2021-06-12 20:02:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1407 transitions. [2021-06-12 20:02:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:14,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:14,915 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:15,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7376 [2021-06-12 20:02:15,116 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:15,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1082938280, now seen corresponding path program 279 times [2021-06-12 20:02:15,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:15,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103351852] [2021-06-12 20:02:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:15,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103351852] [2021-06-12 20:02:15,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103351852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142328138] [2021-06-12 20:02:15,285 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 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 [2021-06-12 20:02:15,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:15,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:15,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:15,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,368 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 15 treesize of output 11 [2021-06-12 20:02:15,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,371 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 16 treesize of output 12 [2021-06-12 20:02:15,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,374 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 [2021-06-12 20:02:15,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,377 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 26 treesize of output 20 [2021-06-12 20:02:15,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,454 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.7 percent of original size [2021-06-12 20:02:15,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:15,455 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:167, output treesize:117 [2021-06-12 20:02:15,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,659 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 17 treesize of output 13 [2021-06-12 20:02:15,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,662 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 15 treesize of output 11 [2021-06-12 20:02:15,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,693 INFO L628 ElimStorePlain]: treesize reduction 59, result has 43.8 percent of original size [2021-06-12 20:02:15,693 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:02:15,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,695 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 [2021-06-12 20:02:15,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:15,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,714 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 21 treesize of output 7 [2021-06-12 20:02:15,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,716 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 11 treesize of output 3 [2021-06-12 20:02:15,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:15,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:15,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:15,737 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 20:02:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:15,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142328138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:15,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:15,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:15,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217828681] [2021-06-12 20:02:15,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:15,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:15,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:15,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:15,760 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) [2021-06-12 20:02:16,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:16,738 INFO L93 Difference]: Finished difference Result 613 states and 1901 transitions. [2021-06-12 20:02:16,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:02:16,738 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 [2021-06-12 20:02:16,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:16,739 INFO L225 Difference]: With dead ends: 613 [2021-06-12 20:02:16,739 INFO L226 Difference]: Without dead ends: 601 [2021-06-12 20:02:16,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 915.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-12 20:02:16,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 429. [2021-06-12 20:02:16,744 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) [2021-06-12 20:02:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1391 transitions. [2021-06-12 20:02:16,745 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1391 transitions. Word has length 18 [2021-06-12 20:02:16,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:16,745 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1391 transitions. [2021-06-12 20:02:16,745 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) [2021-06-12 20:02:16,745 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1391 transitions. [2021-06-12 20:02:16,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:16,745 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:16,745 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:16,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7389 [2021-06-12 20:02:16,946 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:16,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:16,946 INFO L82 PathProgramCache]: Analyzing trace with hash -446381756, now seen corresponding path program 280 times [2021-06-12 20:02:16,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:16,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754536551] [2021-06-12 20:02:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:17,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:17,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754536551] [2021-06-12 20:02:17,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754536551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003620938] [2021-06-12 20:02:17,117 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 [2021-06-12 20:02:17,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:17,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:17,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,193 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 25 treesize of output 19 [2021-06-12 20:02:17,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,197 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 16 treesize of output 12 [2021-06-12 20:02:17,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,200 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 26 treesize of output 20 [2021-06-12 20:02:17,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,204 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 [2021-06-12 20:02:17,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,208 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 [2021-06-12 20:02:17,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,211 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 24 treesize of output 18 [2021-06-12 20:02:17,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,273 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:02:17,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:17,274 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:17,552 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_1880, array_4], 1=[v_prenex_1879, array_0]} [2021-06-12 20:02:17,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:17,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:17,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:17,599 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 20:02:17,601 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 [2021-06-12 20:02:17,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,619 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 [2021-06-12 20:02:17,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:17,622 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 11 treesize of output 3 [2021-06-12 20:02:17,622 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:17,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:17,642 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:02:17,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:17,643 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:02:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:17,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003620938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:17,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:17,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339341343] [2021-06-12 20:02:17,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:17,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:17,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:17,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:17,664 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) [2021-06-12 20:02:18,049 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-12 20:02:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:18,254 INFO L93 Difference]: Finished difference Result 558 states and 1726 transitions. [2021-06-12 20:02:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:18,254 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 [2021-06-12 20:02:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:18,255 INFO L225 Difference]: With dead ends: 558 [2021-06-12 20:02:18,255 INFO L226 Difference]: Without dead ends: 553 [2021-06-12 20:02:18,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 690.2ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-06-12 20:02:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 431. [2021-06-12 20:02:18,260 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) [2021-06-12 20:02:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1395 transitions. [2021-06-12 20:02:18,260 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1395 transitions. Word has length 18 [2021-06-12 20:02:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:18,261 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1395 transitions. [2021-06-12 20:02:18,261 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) [2021-06-12 20:02:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1395 transitions. [2021-06-12 20:02:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:18,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:18,261 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:18,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7401 [2021-06-12 20:02:18,462 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:18,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2024323972, now seen corresponding path program 281 times [2021-06-12 20:02:18,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:18,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121866156] [2021-06-12 20:02:18,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:18,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121866156] [2021-06-12 20:02:18,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121866156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031475906] [2021-06-12 20:02:18,703 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 [2021-06-12 20:02:18,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:18,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:18,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:18,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:18,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,781 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 15 treesize of output 11 [2021-06-12 20:02:18,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,784 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 16 treesize of output 12 [2021-06-12 20:02:18,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,787 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 18 treesize of output 14 [2021-06-12 20:02:18,788 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,790 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 17 treesize of output 13 [2021-06-12 20:02:18,790 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,818 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-12 20:02:18,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:18,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-12 20:02:19,032 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_0]} [2021-06-12 20:02:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,036 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 25 treesize of output 19 [2021-06-12 20:02:19,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,040 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 15 treesize of output 11 [2021-06-12 20:02:19,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,044 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 27 treesize of output 21 [2021-06-12 20:02:19,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:19,048 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 17 treesize of output 13 [2021-06-12 20:02:19,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,118 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 20:02:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,121 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 11 treesize of output 3 [2021-06-12 20:02:19,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,132 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 21 treesize of output 7 [2021-06-12 20:02:19,133 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,146 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 9 treesize of output 3 [2021-06-12 20:02:19,147 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:19,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:19,180 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 6 variables, input treesize:149, output treesize:55 [2021-06-12 20:02:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:19,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031475906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:19,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:19,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:02:19,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229444586] [2021-06-12 20:02:19,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:19,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:19,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:19,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:19,258 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) [2021-06-12 20:02:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:20,259 INFO L93 Difference]: Finished difference Result 561 states and 1758 transitions. [2021-06-12 20:02:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:20,259 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 [2021-06-12 20:02:20,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:20,260 INFO L225 Difference]: With dead ends: 561 [2021-06-12 20:02:20,260 INFO L226 Difference]: Without dead ends: 556 [2021-06-12 20:02:20,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1018.6ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:02:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-12 20:02:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 432. [2021-06-12 20:02:20,264 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) [2021-06-12 20:02:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1397 transitions. [2021-06-12 20:02:20,265 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1397 transitions. Word has length 18 [2021-06-12 20:02:20,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:20,265 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1397 transitions. [2021-06-12 20:02:20,265 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) [2021-06-12 20:02:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1397 transitions. [2021-06-12 20:02:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:20,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:20,266 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:20,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7418 [2021-06-12 20:02:20,466 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:20,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:20,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1950951492, now seen corresponding path program 282 times [2021-06-12 20:02:20,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:20,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923939410] [2021-06-12 20:02:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923939410] [2021-06-12 20:02:20,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923939410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150683974] [2021-06-12 20:02:20,676 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 [2021-06-12 20:02:20,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:20,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,753 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 25 treesize of output 19 [2021-06-12 20:02:20,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,757 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 [2021-06-12 20:02:20,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,760 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 26 treesize of output 20 [2021-06-12 20:02:20,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,764 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 [2021-06-12 20:02:20,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,768 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 15 treesize of output 11 [2021-06-12 20:02:20,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,771 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 18 [2021-06-12 20:02:20,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,832 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:02:20,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:20,833 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:20,984 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1888], 1=[array_0, v_prenex_1887]} [2021-06-12 20:02:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:20,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,991 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 [2021-06-12 20:02:20,991 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:20,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,997 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 15 treesize of output 11 [2021-06-12 20:02:20,998 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,045 INFO L628 ElimStorePlain]: treesize reduction 88, result has 42.1 percent of original size [2021-06-12 20:02:21,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:21,048 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:21,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,070 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:02:21,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,073 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 21 treesize of output 7 [2021-06-12 20:02:21,074 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,076 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 11 treesize of output 3 [2021-06-12 20:02:21,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:21,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:21,104 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:180, output treesize:53 [2021-06-12 20:02:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:21,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150683974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:21,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:21,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874060788] [2021-06-12 20:02:21,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:21,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:21,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:21,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:21,171 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) [2021-06-12 20:02:21,548 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-12 20:02:21,722 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-06-12 20:02:21,923 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-12 20:02:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:21,986 INFO L93 Difference]: Finished difference Result 537 states and 1687 transitions. [2021-06-12 20:02:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:21,987 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 [2021-06-12 20:02:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:21,987 INFO L225 Difference]: With dead ends: 537 [2021-06-12 20:02:21,987 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 20:02:21,988 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 936.9ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:21,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 20:02:21,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 430. [2021-06-12 20:02:21,995 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) [2021-06-12 20:02:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1393 transitions. [2021-06-12 20:02:21,996 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1393 transitions. Word has length 18 [2021-06-12 20:02:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:21,996 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1393 transitions. [2021-06-12 20:02:21,996 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) [2021-06-12 20:02:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1393 transitions. [2021-06-12 20:02:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:21,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:21,997 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:22,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7431 [2021-06-12 20:02:22,197 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:22,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1782463162, now seen corresponding path program 283 times [2021-06-12 20:02:22,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:22,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202939704] [2021-06-12 20:02:22,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:22,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202939704] [2021-06-12 20:02:22,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202939704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297666471] [2021-06-12 20:02:22,387 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 [2021-06-12 20:02:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:22,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:22,471 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 [2021-06-12 20:02:22,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,475 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 [2021-06-12 20:02:22,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,478 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 35 treesize of output 27 [2021-06-12 20:02:22,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:22,482 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 [2021-06-12 20:02:22,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,485 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 [2021-06-12 20:02:22,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,488 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 24 treesize of output 18 [2021-06-12 20:02:22,489 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,597 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 20:02:22,597 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-06-12 20:02:22,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:22,598 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-12 20:02:22,928 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-12 20:02:23,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,066 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 15 treesize of output 11 [2021-06-12 20:02:23,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,072 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 [2021-06-12 20:02:23,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,078 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 27 treesize of output 21 [2021-06-12 20:02:23,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,084 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 26 treesize of output 20 [2021-06-12 20:02:23,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,090 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 [2021-06-12 20:02:23,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,096 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 28 treesize of output 22 [2021-06-12 20:02:23,097 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:23,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,102 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 [2021-06-12 20:02:23,103 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,109 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 25 treesize of output 19 [2021-06-12 20:02:23,121 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,128 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 27 treesize of output 21 [2021-06-12 20:02:23,129 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,134 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 16 treesize of output 12 [2021-06-12 20:02:23,135 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,140 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 26 treesize of output 20 [2021-06-12 20:02:23,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,146 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 16 treesize of output 12 [2021-06-12 20:02:23,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,151 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 28 treesize of output 22 [2021-06-12 20:02:23,152 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,156 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 27 treesize of output 21 [2021-06-12 20:02:23,157 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,306 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-12 20:02:23,306 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 20:02:23,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,316 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 20 treesize of output 9 [2021-06-12 20:02:23,317 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,320 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 20 treesize of output 9 [2021-06-12 20:02:23,321 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:23,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:02:23,376 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 20:02:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297666471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:23,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:23,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303953537] [2021-06-12 20:02:23,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:23,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:23,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:23,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:23,461 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) [2021-06-12 20:02:24,012 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-12 20:02:24,469 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 20:02:25,058 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 111 [2021-06-12 20:02:25,285 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-12 20:02:25,552 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-06-12 20:02:25,792 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-06-12 20:02:26,074 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2021-06-12 20:02:26,240 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 20:02:26,443 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-06-12 20:02:26,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:26,521 INFO L93 Difference]: Finished difference Result 659 states and 2036 transitions. [2021-06-12 20:02:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:02:26,522 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 [2021-06-12 20:02:26,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:26,522 INFO L225 Difference]: With dead ends: 659 [2021-06-12 20:02:26,522 INFO L226 Difference]: Without dead ends: 639 [2021-06-12 20:02:26,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3018.0ms TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:02:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-06-12 20:02:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 425. [2021-06-12 20:02:26,527 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) [2021-06-12 20:02:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1373 transitions. [2021-06-12 20:02:26,528 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1373 transitions. Word has length 18 [2021-06-12 20:02:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:26,528 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1373 transitions. [2021-06-12 20:02:26,528 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) [2021-06-12 20:02:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1373 transitions. [2021-06-12 20:02:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:26,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:26,528 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:26,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7449 [2021-06-12 20:02:26,729 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:26,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 350513638, now seen corresponding path program 284 times [2021-06-12 20:02:26,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:26,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205589622] [2021-06-12 20:02:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205589622] [2021-06-12 20:02:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205589622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524603123] [2021-06-12 20:02:26,951 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 [2021-06-12 20:02:26,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:26,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:26,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,032 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 15 treesize of output 11 [2021-06-12 20:02:27,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,036 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 16 treesize of output 12 [2021-06-12 20:02:27,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,039 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 18 treesize of output 14 [2021-06-12 20:02:27,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,041 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 17 treesize of output 13 [2021-06-12 20:02:27,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,070 INFO L628 ElimStorePlain]: treesize reduction 20, result has 66.1 percent of original size [2021-06-12 20:02:27,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:27,070 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:97, output treesize:39 [2021-06-12 20:02:27,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,143 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 17 treesize of output 13 [2021-06-12 20:02:27,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,147 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 25 treesize of output 19 [2021-06-12 20:02:27,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,151 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 [2021-06-12 20:02:27,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:27,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,157 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 18 treesize of output 14 [2021-06-12 20:02:27,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,161 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 [2021-06-12 20:02:27,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:27,217 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-12 20:02:27,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,220 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 [2021-06-12 20:02:27,220 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,222 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 11 treesize of output 3 [2021-06-12 20:02:27,223 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:27,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:27,254 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-12 20:02:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:27,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524603123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:27,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:27,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368697845] [2021-06-12 20:02:27,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:27,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:27,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:27,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:27,358 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) [2021-06-12 20:02:28,024 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-12 20:02:28,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:28,261 INFO L93 Difference]: Finished difference Result 572 states and 1761 transitions. [2021-06-12 20:02:28,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:28,261 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 [2021-06-12 20:02:28,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:28,262 INFO L225 Difference]: With dead ends: 572 [2021-06-12 20:02:28,262 INFO L226 Difference]: Without dead ends: 561 [2021-06-12 20:02:28,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 886.6ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:28,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-06-12 20:02:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 426. [2021-06-12 20:02:28,266 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) [2021-06-12 20:02:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1380 transitions. [2021-06-12 20:02:28,267 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1380 transitions. Word has length 18 [2021-06-12 20:02:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:28,267 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1380 transitions. [2021-06-12 20:02:28,267 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) [2021-06-12 20:02:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1380 transitions. [2021-06-12 20:02:28,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:28,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:28,268 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:28,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7479,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:28,468 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:28,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1415193868, now seen corresponding path program 285 times [2021-06-12 20:02:28,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:28,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589815771] [2021-06-12 20:02:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:28,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589815771] [2021-06-12 20:02:28,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589815771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174265980] [2021-06-12 20:02:28,778 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 [2021-06-12 20:02:28,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:02:28,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:28,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:28,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:28,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,871 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 15 treesize of output 11 [2021-06-12 20:02:28,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,874 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 26 treesize of output 20 [2021-06-12 20:02:28,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:28,878 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 [2021-06-12 20:02:28,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,881 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 16 treesize of output 12 [2021-06-12 20:02:28,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:28,947 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:02:28,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:28,948 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-12 20:02:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,065 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 16 treesize of output 12 [2021-06-12 20:02:29,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,069 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 15 treesize of output 11 [2021-06-12 20:02:29,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,074 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 18 treesize of output 14 [2021-06-12 20:02:29,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:29,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,081 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 27 treesize of output 21 [2021-06-12 20:02:29,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:29,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,085 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 25 treesize of output 19 [2021-06-12 20:02:29,086 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:29,089 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,188 INFO L628 ElimStorePlain]: treesize reduction 83, result has 49.4 percent of original size [2021-06-12 20:02:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,191 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 11 treesize of output 3 [2021-06-12 20:02:29,192 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,194 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 21 treesize of output 7 [2021-06-12 20:02:29,195 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:29,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:29,227 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:250, output treesize:59 [2021-06-12 20:02:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174265980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:29,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:29,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47003515] [2021-06-12 20:02:29,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:29,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:29,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:29,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:29,339 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) [2021-06-12 20:02:29,844 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-06-12 20:02:30,062 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-12 20:02:30,270 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-12 20:02:30,473 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-12 20:02:30,743 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-12 20:02:30,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:30,853 INFO L93 Difference]: Finished difference Result 550 states and 1707 transitions. [2021-06-12 20:02:30,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:30,853 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 [2021-06-12 20:02:30,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:30,854 INFO L225 Difference]: With dead ends: 550 [2021-06-12 20:02:30,854 INFO L226 Difference]: Without dead ends: 536 [2021-06-12 20:02:30,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1606.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:02:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-12 20:02:30,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 428. [2021-06-12 20:02:30,858 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) [2021-06-12 20:02:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1385 transitions. [2021-06-12 20:02:30,859 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1385 transitions. Word has length 18 [2021-06-12 20:02:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:30,859 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1385 transitions. [2021-06-12 20:02:30,859 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) [2021-06-12 20:02:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1385 transitions. [2021-06-12 20:02:30,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:30,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:30,859 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:31,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7492,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:31,060 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1953749984, now seen corresponding path program 286 times [2021-06-12 20:02:31,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:31,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861429943] [2021-06-12 20:02:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:31,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861429943] [2021-06-12 20:02:31,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861429943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258862913] [2021-06-12 20:02:31,257 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 [2021-06-12 20:02:31,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:31,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:31,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:31,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:31,339 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 15 treesize of output 11 [2021-06-12 20:02:31,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:31,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,345 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 35 treesize of output 27 [2021-06-12 20:02:31,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:31,349 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 25 treesize of output 19 [2021-06-12 20:02:31,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,353 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 [2021-06-12 20:02:31,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,356 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 24 treesize of output 18 [2021-06-12 20:02:31,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,464 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 20:02:31,465 INFO L628 ElimStorePlain]: treesize reduction 56, result has 78.4 percent of original size [2021-06-12 20:02:31,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:31,466 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-12 20:02:31,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,660 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 27 treesize of output 21 [2021-06-12 20:02:31,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,666 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 [2021-06-12 20:02:31,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,672 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 28 treesize of output 22 [2021-06-12 20:02:31,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,678 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 [2021-06-12 20:02:31,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,684 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 [2021-06-12 20:02:31,685 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,691 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 27 treesize of output 21 [2021-06-12 20:02:31,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,697 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 26 treesize of output 20 [2021-06-12 20:02:31,698 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,703 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 25 treesize of output 19 [2021-06-12 20:02:31,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,709 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 [2021-06-12 20:02:31,710 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,715 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 46 treesize of output 36 [2021-06-12 20:02:31,716 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:31,721 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:31,724 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,729 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 45 treesize of output 35 [2021-06-12 20:02:31,730 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:31,734 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,830 INFO L628 ElimStorePlain]: treesize reduction 214, result has 27.2 percent of original size [2021-06-12 20:02:31,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,834 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 10 treesize of output 5 [2021-06-12 20:02:31,834 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,837 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 10 treesize of output 5 [2021-06-12 20:02:31,837 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:31,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:31,864 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:611, output treesize:70 [2021-06-12 20:02:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258862913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:31,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:31,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286055390] [2021-06-12 20:02:31,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:31,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:31,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:31,984 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) [2021-06-12 20:02:32,475 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-12 20:02:32,964 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-06-12 20:02:33,387 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2021-06-12 20:02:33,692 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-12 20:02:33,901 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-12 20:02:34,054 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2021-06-12 20:02:34,231 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 20:02:34,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:34,302 INFO L93 Difference]: Finished difference Result 679 states and 2103 transitions. [2021-06-12 20:02:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:34,302 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 [2021-06-12 20:02:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:34,303 INFO L225 Difference]: With dead ends: 679 [2021-06-12 20:02:34,303 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 20:02:34,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 2177.8ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:34,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 20:02:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 426. [2021-06-12 20:02:34,308 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) [2021-06-12 20:02:34,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1380 transitions. [2021-06-12 20:02:34,309 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1380 transitions. Word has length 18 [2021-06-12 20:02:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:34,309 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1380 transitions. [2021-06-12 20:02:34,309 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) [2021-06-12 20:02:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1380 transitions. [2021-06-12 20:02:34,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:34,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:34,309 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:34,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7503,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:34,510 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:34,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1498526464, now seen corresponding path program 287 times [2021-06-12 20:02:34,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:34,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132068336] [2021-06-12 20:02:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:34,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132068336] [2021-06-12 20:02:34,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132068336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867780948] [2021-06-12 20:02:34,723 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 [2021-06-12 20:02:34,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:34,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:34,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:34,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:34,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,800 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 25 treesize of output 19 [2021-06-12 20:02:34,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,803 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 16 treesize of output 12 [2021-06-12 20:02:34,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,807 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 26 treesize of output 20 [2021-06-12 20:02:34,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,810 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 [2021-06-12 20:02:34,811 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,814 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 15 treesize of output 11 [2021-06-12 20:02:34,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,817 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 24 treesize of output 18 [2021-06-12 20:02:34,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,878 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:02:34,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:34,879 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,987 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 35 treesize of output 27 [2021-06-12 20:02:34,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:34,991 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 18 treesize of output 14 [2021-06-12 20:02:34,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:34,996 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 [2021-06-12 20:02:34,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,000 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 15 treesize of output 11 [2021-06-12 20:02:35,001 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,004 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 25 treesize of output 19 [2021-06-12 20:02:35,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,008 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 25 treesize of output 19 [2021-06-12 20:02:35,009 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,012 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 26 treesize of output 20 [2021-06-12 20:02:35,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,083 INFO L628 ElimStorePlain]: treesize reduction 198, result has 29.5 percent of original size [2021-06-12 20:02:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,085 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 21 treesize of output 7 [2021-06-12 20:02:35,086 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,088 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 21 treesize of output 7 [2021-06-12 20:02:35,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:35,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:35,120 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-06-12 20:02:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867780948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:35,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:35,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897764282] [2021-06-12 20:02:35,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:35,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:35,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:35,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:35,233 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) [2021-06-12 20:02:35,720 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-06-12 20:02:35,898 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2021-06-12 20:02:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:35,958 INFO L93 Difference]: Finished difference Result 536 states and 1675 transitions. [2021-06-12 20:02:35,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:35,958 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 [2021-06-12 20:02:35,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:35,959 INFO L225 Difference]: With dead ends: 536 [2021-06-12 20:02:35,959 INFO L226 Difference]: Without dead ends: 530 [2021-06-12 20:02:35,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 845.2ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-06-12 20:02:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 426. [2021-06-12 20:02:35,963 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) [2021-06-12 20:02:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1379 transitions. [2021-06-12 20:02:35,964 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1379 transitions. Word has length 18 [2021-06-12 20:02:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:35,964 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1379 transitions. [2021-06-12 20:02:35,964 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) [2021-06-12 20:02:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1379 transitions. [2021-06-12 20:02:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:35,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:35,968 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:36,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7526,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:36,169 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1558536974, now seen corresponding path program 288 times [2021-06-12 20:02:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:36,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253970945] [2021-06-12 20:02:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:36,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253970945] [2021-06-12 20:02:36,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253970945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521981829] [2021-06-12 20:02:36,372 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 [2021-06-12 20:02:36,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:36,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:36,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:36,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,441 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 [2021-06-12 20:02:36,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,444 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 25 treesize of output 19 [2021-06-12 20:02:36,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,447 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 26 treesize of output 20 [2021-06-12 20:02:36,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,450 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 25 treesize of output 19 [2021-06-12 20:02:36,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,454 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 [2021-06-12 20:02:36,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,456 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 24 treesize of output 18 [2021-06-12 20:02:36,457 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,517 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:02:36,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:36,518 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:02:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,626 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 [2021-06-12 20:02:36,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,631 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 18 treesize of output 14 [2021-06-12 20:02:36,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,637 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 [2021-06-12 20:02:36,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,643 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 [2021-06-12 20:02:36,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,650 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 [2021-06-12 20:02:36,651 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:36,655 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,659 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 35 treesize of output 27 [2021-06-12 20:02:36,661 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:36,745 INFO L628 ElimStorePlain]: treesize reduction 174, result has 32.3 percent of original size [2021-06-12 20:02:36,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,749 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 [2021-06-12 20:02:36,750 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,753 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 [2021-06-12 20:02:36,754 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:36,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:36,799 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:270, output treesize:55 [2021-06-12 20:02:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521981829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:36,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:02:36,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307787609] [2021-06-12 20:02:36,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:36,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:36,934 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) [2021-06-12 20:02:37,431 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:02:37,646 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-12 20:02:37,844 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-12 20:02:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:38,061 INFO L93 Difference]: Finished difference Result 552 states and 1723 transitions. [2021-06-12 20:02:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:02:38,061 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 [2021-06-12 20:02:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:38,062 INFO L225 Difference]: With dead ends: 552 [2021-06-12 20:02:38,062 INFO L226 Difference]: Without dead ends: 547 [2021-06-12 20:02:38,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1099.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:02:38,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-06-12 20:02:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 423. [2021-06-12 20:02:38,066 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) [2021-06-12 20:02:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1366 transitions. [2021-06-12 20:02:38,067 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1366 transitions. Word has length 18 [2021-06-12 20:02:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:38,067 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1366 transitions. [2021-06-12 20:02:38,067 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) [2021-06-12 20:02:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1366 transitions. [2021-06-12 20:02:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:38,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:38,067 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:38,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7539 [2021-06-12 20:02:38,268 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1921396440, now seen corresponding path program 289 times [2021-06-12 20:02:38,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:38,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601867553] [2021-06-12 20:02:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:38,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:38,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601867553] [2021-06-12 20:02:38,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601867553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118124284] [2021-06-12 20:02:38,414 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 [2021-06-12 20:02:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:38,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:38,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:38,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:38,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,591 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 16 treesize of output 12 [2021-06-12 20:02:38,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,594 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 16 treesize of output 12 [2021-06-12 20:02:38,595 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,597 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 [2021-06-12 20:02:38,598 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:38,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,656 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:02:38,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:38,657 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:193, output treesize:81 [2021-06-12 20:02:38,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,712 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 17 treesize of output 13 [2021-06-12 20:02:38,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,716 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 [2021-06-12 20:02:38,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,766 INFO L628 ElimStorePlain]: treesize reduction 92, result has 43.6 percent of original size [2021-06-12 20:02:38,766 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1900 vanished before elimination [2021-06-12 20:02:38,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,768 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 27 treesize of output 21 [2021-06-12 20:02:38,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:38,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,796 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 11 treesize of output 3 [2021-06-12 20:02:38,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:38,799 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 21 treesize of output 7 [2021-06-12 20:02:38,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:38,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:38,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:38,851 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1898 vanished before elimination [2021-06-12 20:02:38,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:38,852 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:177, output treesize:53 [2021-06-12 20:02:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:38,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118124284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:38,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:38,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:02:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668634025] [2021-06-12 20:02:38,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:38,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:38,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:38,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:38,914 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) [2021-06-12 20:02:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:39,528 INFO L93 Difference]: Finished difference Result 539 states and 1643 transitions. [2021-06-12 20:02:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:39,529 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 [2021-06-12 20:02:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:39,529 INFO L225 Difference]: With dead ends: 539 [2021-06-12 20:02:39,529 INFO L226 Difference]: Without dead ends: 531 [2021-06-12 20:02:39,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-12 20:02:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 419. [2021-06-12 20:02:39,534 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) [2021-06-12 20:02:39,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1356 transitions. [2021-06-12 20:02:39,534 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1356 transitions. Word has length 18 [2021-06-12 20:02:39,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:39,534 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1356 transitions. [2021-06-12 20:02:39,534 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) [2021-06-12 20:02:39,534 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1356 transitions. [2021-06-12 20:02:39,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:39,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:39,535 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:39,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7550,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:39,735 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:39,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:39,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1307733628, now seen corresponding path program 290 times [2021-06-12 20:02:39,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:39,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522954204] [2021-06-12 20:02:39,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:39,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522954204] [2021-06-12 20:02:39,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522954204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288550077] [2021-06-12 20:02:39,857 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 [2021-06-12 20:02:39,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:39,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:39,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:39,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:39,974 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 15 treesize of output 11 [2021-06-12 20:02:39,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,977 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 25 treesize of output 19 [2021-06-12 20:02:39,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,980 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 24 treesize of output 18 [2021-06-12 20:02:39,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,027 INFO L628 ElimStorePlain]: treesize reduction 36, result has 64.0 percent of original size [2021-06-12 20:02:40,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:40,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:121, output treesize:64 [2021-06-12 20:02:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:40,139 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 25 treesize of output 19 [2021-06-12 20:02:40,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,161 INFO L628 ElimStorePlain]: treesize reduction 55, result has 40.2 percent of original size [2021-06-12 20:02:40,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:40,163 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 27 treesize of output 21 [2021-06-12 20:02:40,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:40,180 INFO L628 ElimStorePlain]: treesize reduction 23, result has 52.1 percent of original size [2021-06-12 20:02:40,180 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1904 vanished before elimination [2021-06-12 20:02:40,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:40,182 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 11 treesize of output 3 [2021-06-12 20:02:40,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:40,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:40,189 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:99, output treesize:11 [2021-06-12 20:02:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288550077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:40,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:40,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258672734] [2021-06-12 20:02:40,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:40,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:40,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:40,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:40,211 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) [2021-06-12 20:02:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:40,691 INFO L93 Difference]: Finished difference Result 503 states and 1588 transitions. [2021-06-12 20:02:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:40,691 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 [2021-06-12 20:02:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:40,692 INFO L225 Difference]: With dead ends: 503 [2021-06-12 20:02:40,692 INFO L226 Difference]: Without dead ends: 487 [2021-06-12 20:02:40,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-12 20:02:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 415. [2021-06-12 20:02:40,695 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) [2021-06-12 20:02:40,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1345 transitions. [2021-06-12 20:02:40,696 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1345 transitions. Word has length 18 [2021-06-12 20:02:40,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:40,696 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1345 transitions. [2021-06-12 20:02:40,696 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) [2021-06-12 20:02:40,696 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1345 transitions. [2021-06-12 20:02:40,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:40,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:40,697 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:40,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7562 [2021-06-12 20:02:40,897 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:40,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:40,898 INFO L82 PathProgramCache]: Analyzing trace with hash 173504242, now seen corresponding path program 291 times [2021-06-12 20:02:40,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:40,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334097322] [2021-06-12 20:02:40,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:41,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334097322] [2021-06-12 20:02:41,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334097322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021746784] [2021-06-12 20:02:41,013 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 [2021-06-12 20:02:41,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:41,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:41,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,126 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 19 treesize of output 13 [2021-06-12 20:02:41,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,129 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 29 treesize of output 21 [2021-06-12 20:02:41,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:41,151 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:85, output treesize:69 [2021-06-12 20:02:41,201 INFO L446 ElimStorePlain]: Different costs {0=[array_2], 1=[array_4]} [2021-06-12 20:02:41,204 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 25 treesize of output 19 [2021-06-12 20:02:41,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,207 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 [2021-06-12 20:02:41,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:41,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,214 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 27 treesize of output 21 [2021-06-12 20:02:41,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:41,265 INFO L628 ElimStorePlain]: treesize reduction 38, result has 65.5 percent of original size [2021-06-12 20:02:41,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,268 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 [2021-06-12 20:02:41,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:41,271 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 21 treesize of output 7 [2021-06-12 20:02:41,271 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:41,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:41,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:41,301 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:149, output treesize:38 [2021-06-12 20:02:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021746784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:41,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:02:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839907452] [2021-06-12 20:02:41,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:41,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:41,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:41,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:41,360 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) [2021-06-12 20:02:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:41,876 INFO L93 Difference]: Finished difference Result 483 states and 1534 transitions. [2021-06-12 20:02:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:41,876 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 [2021-06-12 20:02:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:41,877 INFO L225 Difference]: With dead ends: 483 [2021-06-12 20:02:41,877 INFO L226 Difference]: Without dead ends: 470 [2021-06-12 20:02:41,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-12 20:02:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 402. [2021-06-12 20:02:41,881 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) [2021-06-12 20:02:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1300 transitions. [2021-06-12 20:02:41,882 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1300 transitions. Word has length 18 [2021-06-12 20:02:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:41,882 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1300 transitions. [2021-06-12 20:02:41,882 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) [2021-06-12 20:02:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1300 transitions. [2021-06-12 20:02:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:41,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:41,882 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:42,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7573 [2021-06-12 20:02:42,083 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash 874568820, now seen corresponding path program 292 times [2021-06-12 20:02:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:42,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68304465] [2021-06-12 20:02:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68304465] [2021-06-12 20:02:42,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68304465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427045544] [2021-06-12 20:02:42,278 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 [2021-06-12 20:02:42,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:42,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:42,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:42,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,400 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 [2021-06-12 20:02:42,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,404 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 26 treesize of output 20 [2021-06-12 20:02:42,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,423 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 25 treesize of output 19 [2021-06-12 20:02:42,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,427 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 16 treesize of output 12 [2021-06-12 20:02:42,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,518 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-12 20:02:42,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:42,519 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-12 20:02:42,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,694 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 [2021-06-12 20:02:42,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,698 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 27 treesize of output 21 [2021-06-12 20:02:42,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:42,773 INFO L628 ElimStorePlain]: treesize reduction 95, result has 49.2 percent of original size [2021-06-12 20:02:42,776 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 7 treesize of output 5 [2021-06-12 20:02:42,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,780 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 7 treesize of output 5 [2021-06-12 20:02:42,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1906 vanished before elimination [2021-06-12 20:02:42,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,812 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 11 treesize of output 3 [2021-06-12 20:02:42,812 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,815 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 21 treesize of output 7 [2021-06-12 20:02:42,816 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:42,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:42,850 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:183, output treesize:56 [2021-06-12 20:02:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427045544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:42,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:42,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685423424] [2021-06-12 20:02:42,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:42,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:42,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:42,934 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) [2021-06-12 20:02:43,538 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-12 20:02:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:43,758 INFO L93 Difference]: Finished difference Result 462 states and 1465 transitions. [2021-06-12 20:02:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:43,759 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 [2021-06-12 20:02:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:43,759 INFO L225 Difference]: With dead ends: 462 [2021-06-12 20:02:43,759 INFO L226 Difference]: Without dead ends: 454 [2021-06-12 20:02:43,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 953.1ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-12 20:02:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 402. [2021-06-12 20:02:43,763 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) [2021-06-12 20:02:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1300 transitions. [2021-06-12 20:02:43,764 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1300 transitions. Word has length 18 [2021-06-12 20:02:43,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:43,764 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1300 transitions. [2021-06-12 20:02:43,764 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) [2021-06-12 20:02:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1300 transitions. [2021-06-12 20:02:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:43,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:43,765 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:43,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7582,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:43,965 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash 2069604994, now seen corresponding path program 293 times [2021-06-12 20:02:43,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:43,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799240403] [2021-06-12 20:02:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:44,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:44,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799240403] [2021-06-12 20:02:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799240403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118186231] [2021-06-12 20:02:44,137 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 [2021-06-12 20:02:44,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:44,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:44,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:44,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:44,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,227 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 25 treesize of output 19 [2021-06-12 20:02:44,228 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:44,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:44,233 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 17 treesize of output 13 [2021-06-12 20:02:44,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:44,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:143, output treesize:131 [2021-06-12 20:02:44,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,354 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 18 treesize of output 14 [2021-06-12 20:02:44,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,359 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 27 treesize of output 21 [2021-06-12 20:02:44,359 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,363 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 18 treesize of output 14 [2021-06-12 20:02:44,364 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,367 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 15 treesize of output 11 [2021-06-12 20:02:44,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:44,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:02:44,376 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,379 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 25 treesize of output 19 [2021-06-12 20:02:44,380 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:44,383 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:44,386 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:44,389 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,452 INFO L628 ElimStorePlain]: treesize reduction 64, result has 57.6 percent of original size [2021-06-12 20:02:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,456 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 10 treesize of output 5 [2021-06-12 20:02:44,456 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,459 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 20 treesize of output 9 [2021-06-12 20:02:44,459 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:44,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:44,487 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:367, output treesize:71 [2021-06-12 20:02:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:44,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118186231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:44,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:44,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779881666] [2021-06-12 20:02:44,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:44,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:44,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:44,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:44,587 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) [2021-06-12 20:02:45,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:45,013 INFO L93 Difference]: Finished difference Result 470 states and 1488 transitions. [2021-06-12 20:02:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:45,013 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 18 [2021-06-12 20:02:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:45,014 INFO L225 Difference]: With dead ends: 470 [2021-06-12 20:02:45,014 INFO L226 Difference]: Without dead ends: 460 [2021-06-12 20:02:45,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-06-12 20:02:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 405. [2021-06-12 20:02:45,018 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) [2021-06-12 20:02:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-06-12 20:02:45,018 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-06-12 20:02:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:45,018 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-06-12 20:02:45,018 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) [2021-06-12 20:02:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-06-12 20:02:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:45,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:45,019 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:45,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7593 [2021-06-12 20:02:45,219 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash 129616248, now seen corresponding path program 294 times [2021-06-12 20:02:45,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:45,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417973933] [2021-06-12 20:02:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:45,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:45,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417973933] [2021-06-12 20:02:45,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417973933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242817319] [2021-06-12 20:02:45,413 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 [2021-06-12 20:02:45,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:02:45,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:45,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:45,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,535 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 25 treesize of output 19 [2021-06-12 20:02:45,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,538 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 35 treesize of output 27 [2021-06-12 20:02:45,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 20:02:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:45,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,546 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 [2021-06-12 20:02:45,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,549 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 [2021-06-12 20:02:45,550 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,665 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-12 20:02:45,666 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.6 percent of original size [2021-06-12 20:02:45,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:45,667 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:247, output treesize:215 [2021-06-12 20:02:45,930 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-12 20:02:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,061 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 28 treesize of output 22 [2021-06-12 20:02:46,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:46,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,067 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 16 treesize of output 12 [2021-06-12 20:02:46,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,073 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 28 treesize of output 22 [2021-06-12 20:02:46,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,078 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 [2021-06-12 20:02:46,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,085 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 [2021-06-12 20:02:46,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,091 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 27 treesize of output 21 [2021-06-12 20:02:46,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,097 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 [2021-06-12 20:02:46,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,102 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 27 treesize of output 21 [2021-06-12 20:02:46,103 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,109 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 [2021-06-12 20:02:46,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,115 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 27 treesize of output 21 [2021-06-12 20:02:46,116 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,121 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 [2021-06-12 20:02:46,122 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,126 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 28 treesize of output 22 [2021-06-12 20:02:46,127 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,132 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 16 treesize of output 12 [2021-06-12 20:02:46,133 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,137 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 26 treesize of output 20 [2021-06-12 20:02:46,138 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,284 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-12 20:02:46,284 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 20:02:46,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,289 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 20 treesize of output 9 [2021-06-12 20:02:46,290 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,293 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 20 treesize of output 9 [2021-06-12 20:02:46,294 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:46,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:02:46,350 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 20:02:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:46,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242817319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:46,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:46,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890917402] [2021-06-12 20:02:46,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:46,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:46,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:46,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:46,435 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) [2021-06-12 20:02:46,879 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-12 20:02:47,179 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2021-06-12 20:02:47,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:47,486 INFO L93 Difference]: Finished difference Result 488 states and 1537 transitions. [2021-06-12 20:02:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:47,486 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 [2021-06-12 20:02:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:47,487 INFO L225 Difference]: With dead ends: 488 [2021-06-12 20:02:47,487 INFO L226 Difference]: Without dead ends: 474 [2021-06-12 20:02:47,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1191.3ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:47,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-12 20:02:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 400. [2021-06-12 20:02:47,490 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) [2021-06-12 20:02:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1295 transitions. [2021-06-12 20:02:47,491 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1295 transitions. Word has length 18 [2021-06-12 20:02:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:47,491 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1295 transitions. [2021-06-12 20:02:47,491 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) [2021-06-12 20:02:47,491 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1295 transitions. [2021-06-12 20:02:47,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:47,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:47,492 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:47,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7610 [2021-06-12 20:02:47,692 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:47,692 INFO L82 PathProgramCache]: Analyzing trace with hash 722420652, now seen corresponding path program 295 times [2021-06-12 20:02:47,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:47,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523832667] [2021-06-12 20:02:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:47,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523832667] [2021-06-12 20:02:47,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523832667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928289143] [2021-06-12 20:02:47,861 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 [2021-06-12 20:02:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:47,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:47,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,963 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 25 treesize of output 19 [2021-06-12 20:02:47,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,967 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 24 treesize of output 18 [2021-06-12 20:02:47,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,971 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 26 treesize of output 20 [2021-06-12 20:02:47,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,976 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 16 treesize of output 12 [2021-06-12 20:02:47,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,980 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 [2021-06-12 20:02:47,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,983 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 15 treesize of output 11 [2021-06-12 20:02:47,984 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,074 INFO L628 ElimStorePlain]: treesize reduction 74, result has 60.4 percent of original size [2021-06-12 20:02:48,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:48,075 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:253, output treesize:113 [2021-06-12 20:02:48,307 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1920], 1=[array_0, v_prenex_1919]} [2021-06-12 20:02:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:48,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,313 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 15 treesize of output 11 [2021-06-12 20:02:48,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,352 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 20:02:48,354 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 [2021-06-12 20:02:48,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:48,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,370 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:02:48,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,373 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 [2021-06-12 20:02:48,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:02:48,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:48,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:48,397 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:02:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928289143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:48,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:48,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165729477] [2021-06-12 20:02:48,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:48,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:48,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:48,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:48,419 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) [2021-06-12 20:02:49,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:49,001 INFO L93 Difference]: Finished difference Result 462 states and 1463 transitions. [2021-06-12 20:02:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:49,001 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 [2021-06-12 20:02:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:49,002 INFO L225 Difference]: With dead ends: 462 [2021-06-12 20:02:49,002 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 20:02:49,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:49,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 20:02:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 403. [2021-06-12 20:02:49,006 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) [2021-06-12 20:02:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1307 transitions. [2021-06-12 20:02:49,007 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1307 transitions. Word has length 18 [2021-06-12 20:02:49,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:49,007 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1307 transitions. [2021-06-12 20:02:49,007 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) [2021-06-12 20:02:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1307 transitions. [2021-06-12 20:02:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:49,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:49,007 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:49,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7628 [2021-06-12 20:02:49,208 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:49,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:49,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1217568094, now seen corresponding path program 296 times [2021-06-12 20:02:49,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:49,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657600434] [2021-06-12 20:02:49,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:49,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:49,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657600434] [2021-06-12 20:02:49,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657600434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232949106] [2021-06-12 20:02:49,373 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 [2021-06-12 20:02:49,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:49,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:49,464 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 16 treesize of output 12 [2021-06-12 20:02:49,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,467 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 17 treesize of output 13 [2021-06-12 20:02:49,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:49,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,473 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 15 treesize of output 11 [2021-06-12 20:02:49,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,518 INFO L628 ElimStorePlain]: treesize reduction 28, result has 69.2 percent of original size [2021-06-12 20:02:49,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:49,519 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-12 20:02:49,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,676 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 15 treesize of output 11 [2021-06-12 20:02:49,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,680 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 25 treesize of output 19 [2021-06-12 20:02:49,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,684 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 27 treesize of output 21 [2021-06-12 20:02:49,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:49,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,688 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 17 treesize of output 13 [2021-06-12 20:02:49,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,763 INFO L628 ElimStorePlain]: treesize reduction 38, result has 72.7 percent of original size [2021-06-12 20:02:49,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,766 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 [2021-06-12 20:02:49,767 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,770 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 21 treesize of output 7 [2021-06-12 20:02:49,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:49,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,780 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 9 treesize of output 3 [2021-06-12 20:02:49,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:49,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:49,813 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:149, output treesize:55 [2021-06-12 20:02:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:49,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232949106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:49,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:02:49,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986016321] [2021-06-12 20:02:49,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:02:49,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:02:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:02:49,896 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) [2021-06-12 20:02:50,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:50,473 INFO L93 Difference]: Finished difference Result 476 states and 1507 transitions. [2021-06-12 20:02:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:02:50,473 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 [2021-06-12 20:02:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:50,474 INFO L225 Difference]: With dead ends: 476 [2021-06-12 20:02:50,474 INFO L226 Difference]: Without dead ends: 471 [2021-06-12 20:02:50,474 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-12 20:02:50,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 401. [2021-06-12 20:02:50,478 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) [2021-06-12 20:02:50,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1297 transitions. [2021-06-12 20:02:50,479 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1297 transitions. Word has length 18 [2021-06-12 20:02:50,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:50,479 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1297 transitions. [2021-06-12 20:02:50,479 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) [2021-06-12 20:02:50,479 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1297 transitions. [2021-06-12 20:02:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:50,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:50,480 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:50,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7646,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:50,680 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:50,680 INFO L82 PathProgramCache]: Analyzing trace with hash -92385502, now seen corresponding path program 297 times [2021-06-12 20:02:50,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:50,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708346914] [2021-06-12 20:02:50,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:50,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:50,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708346914] [2021-06-12 20:02:50,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708346914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116552103] [2021-06-12 20:02:50,917 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 [2021-06-12 20:02:50,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:50,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,018 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 [2021-06-12 20:02:51,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,022 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 18 treesize of output 14 [2021-06-12 20:02:51,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,030 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 15 treesize of output 11 [2021-06-12 20:02:51,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:51,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,088 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-12 20:02:51,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:51,089 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-12 20:02:51,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,159 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 17 treesize of output 13 [2021-06-12 20:02:51,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,163 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 [2021-06-12 20:02:51,164 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,167 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 15 treesize of output 11 [2021-06-12 20:02:51,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:51,171 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:51,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,177 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 27 treesize of output 21 [2021-06-12 20:02:51,178 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:51,233 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-12 20:02:51,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,236 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 21 treesize of output 7 [2021-06-12 20:02:51,237 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,239 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 11 treesize of output 3 [2021-06-12 20:02:51,239 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:51,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:51,271 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-12 20:02:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116552103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:51,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:02:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399787541] [2021-06-12 20:02:51,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:51,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:51,375 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) [2021-06-12 20:02:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:52,114 INFO L93 Difference]: Finished difference Result 488 states and 1525 transitions. [2021-06-12 20:02:52,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:02:52,115 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 [2021-06-12 20:02:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:52,115 INFO L225 Difference]: With dead ends: 488 [2021-06-12 20:02:52,116 INFO L226 Difference]: Without dead ends: 477 [2021-06-12 20:02:52,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 771.2ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:02:52,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-12 20:02:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 402. [2021-06-12 20:02:52,119 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) [2021-06-12 20:02:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1304 transitions. [2021-06-12 20:02:52,120 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1304 transitions. Word has length 18 [2021-06-12 20:02:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:52,120 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1304 transitions. [2021-06-12 20:02:52,120 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) [2021-06-12 20:02:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1304 transitions. [2021-06-12 20:02:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:52,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:52,121 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:52,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7661 [2021-06-12 20:02:52,321 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1651696552, now seen corresponding path program 298 times [2021-06-12 20:02:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:52,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183363802] [2021-06-12 20:02:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:52,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183363802] [2021-06-12 20:02:52,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183363802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669180217] [2021-06-12 20:02:52,548 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 [2021-06-12 20:02:52,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:52,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:52,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:52,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:52,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,661 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 [2021-06-12 20:02:52,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,664 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 26 treesize of output 20 [2021-06-12 20:02:52,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,668 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 [2021-06-12 20:02:52,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,671 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 16 treesize of output 12 [2021-06-12 20:02:52,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,746 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.5 percent of original size [2021-06-12 20:02:52,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:52,747 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:159, output treesize:109 [2021-06-12 20:02:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,818 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 [2021-06-12 20:02:52,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:52,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,895 INFO L628 ElimStorePlain]: treesize reduction 76, result has 58.7 percent of original size [2021-06-12 20:02:52,895 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1924 vanished before elimination [2021-06-12 20:02:52,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,898 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 27 treesize of output 21 [2021-06-12 20:02:52,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:52,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:52,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,939 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 18 treesize of output 14 [2021-06-12 20:02:52,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,994 INFO L628 ElimStorePlain]: treesize reduction 21, result has 79.4 percent of original size [2021-06-12 20:02:52,994 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1926 vanished before elimination [2021-06-12 20:02:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,997 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 11 treesize of output 3 [2021-06-12 20:02:52,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:53,000 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 [2021-06-12 20:02:53,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:53,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:53,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:53,038 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:229, output treesize:59 [2021-06-12 20:02:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:53,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669180217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:53,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:53,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447423576] [2021-06-12 20:02:53,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:53,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:53,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:53,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:53,147 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) [2021-06-12 20:02:53,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:53,991 INFO L93 Difference]: Finished difference Result 498 states and 1555 transitions. [2021-06-12 20:02:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:53,991 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 [2021-06-12 20:02:53,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:53,992 INFO L225 Difference]: With dead ends: 498 [2021-06-12 20:02:53,992 INFO L226 Difference]: Without dead ends: 484 [2021-06-12 20:02:53,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-12 20:02:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 403. [2021-06-12 20:02:53,995 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) [2021-06-12 20:02:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1307 transitions. [2021-06-12 20:02:53,996 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1307 transitions. Word has length 18 [2021-06-12 20:02:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:53,996 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1307 transitions. [2021-06-12 20:02:53,996 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) [2021-06-12 20:02:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1307 transitions. [2021-06-12 20:02:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:53,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:53,997 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:54,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7675,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:54,197 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:54,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1055627324, now seen corresponding path program 299 times [2021-06-12 20:02:54,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:54,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774393383] [2021-06-12 20:02:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:54,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774393383] [2021-06-12 20:02:54,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774393383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213032593] [2021-06-12 20:02:54,442 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 [2021-06-12 20:02:54,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:54,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,547 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 17 treesize of output 13 [2021-06-12 20:02:54,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,551 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 18 treesize of output 14 [2021-06-12 20:02:54,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,555 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 15 treesize of output 11 [2021-06-12 20:02:54,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:54,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,613 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.0 percent of original size [2021-06-12 20:02:54,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:54,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:129, output treesize:63 [2021-06-12 20:02:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,693 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 17 treesize of output 13 [2021-06-12 20:02:54,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,699 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 [2021-06-12 20:02:54,700 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,704 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 15 treesize of output 11 [2021-06-12 20:02:54,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:54,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,712 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 18 treesize of output 14 [2021-06-12 20:02:54,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,720 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 [2021-06-12 20:02:54,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:54,793 INFO L628 ElimStorePlain]: treesize reduction 61, result has 56.1 percent of original size [2021-06-12 20:02:54,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,797 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 [2021-06-12 20:02:54,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,800 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 11 treesize of output 3 [2021-06-12 20:02:54,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:54,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:54,841 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 2 variables, input treesize:191, output treesize:56 [2021-06-12 20:02:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213032593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:54,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:02:54,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156256863] [2021-06-12 20:02:54,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:02:54,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:54,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:02:54,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:02:54,973 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) [2021-06-12 20:02:55,927 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 20:02:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:56,041 INFO L93 Difference]: Finished difference Result 463 states and 1465 transitions. [2021-06-12 20:02:56,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:02:56,041 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 [2021-06-12 20:02:56,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:56,042 INFO L225 Difference]: With dead ends: 463 [2021-06-12 20:02:56,042 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 20:02:56,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1137.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:02:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 20:02:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 402. [2021-06-12 20:02:56,046 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) [2021-06-12 20:02:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1303 transitions. [2021-06-12 20:02:56,047 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1303 transitions. Word has length 18 [2021-06-12 20:02:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:56,047 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1303 transitions. [2021-06-12 20:02:56,047 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) [2021-06-12 20:02:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1303 transitions. [2021-06-12 20:02:56,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:56,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:56,047 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:56,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7687 [2021-06-12 20:02:56,248 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:56,248 INFO L82 PathProgramCache]: Analyzing trace with hash 306291208, now seen corresponding path program 300 times [2021-06-12 20:02:56,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:56,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956545564] [2021-06-12 20:02:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:56,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956545564] [2021-06-12 20:02:56,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956545564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137841732] [2021-06-12 20:02:56,516 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 [2021-06-12 20:02:56,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:56,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:56,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:02:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:56,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,640 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 26 treesize of output 20 [2021-06-12 20:02:56,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,644 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 15 treesize of output 11 [2021-06-12 20:02:56,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,648 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 [2021-06-12 20:02:56,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,651 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 16 treesize of output 12 [2021-06-12 20:02:56,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,752 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-06-12 20:02:56,753 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.4 percent of original size [2021-06-12 20:02:56,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:56,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:199, output treesize:149 [2021-06-12 20:02:56,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,841 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 27 treesize of output 21 [2021-06-12 20:02:56,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:56,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,845 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 25 treesize of output 19 [2021-06-12 20:02:56,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:56,964 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 20:02:56,964 INFO L628 ElimStorePlain]: treesize reduction 137, result has 54.8 percent of original size [2021-06-12 20:02:56,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:56,968 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 18 treesize of output 14 [2021-06-12 20:02:56,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,061 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.7 percent of original size [2021-06-12 20:02:57,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,065 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 [2021-06-12 20:02:57,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:57,068 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 21 treesize of output 7 [2021-06-12 20:02:57,069 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:57,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1928 vanished before elimination [2021-06-12 20:02:57,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:02:57,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:57,193 INFO L628 ElimStorePlain]: treesize reduction 29, result has 75.4 percent of original size [2021-06-12 20:02:57,193 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1931 vanished before elimination [2021-06-12 20:02:57,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:57,195 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:299, output treesize:89 [2021-06-12 20:02:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:57,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137841732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:57,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:57,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:57,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242946505] [2021-06-12 20:02:57,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:57,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:57,343 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) [2021-06-12 20:02:57,734 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-06-12 20:02:58,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:58,043 INFO L93 Difference]: Finished difference Result 469 states and 1485 transitions. [2021-06-12 20:02:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:02:58,043 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 [2021-06-12 20:02:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:58,044 INFO L225 Difference]: With dead ends: 469 [2021-06-12 20:02:58,044 INFO L226 Difference]: Without dead ends: 463 [2021-06-12 20:02:58,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 905.2ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-12 20:02:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 399. [2021-06-12 20:02:58,048 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) [2021-06-12 20:02:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1290 transitions. [2021-06-12 20:02:58,048 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1290 transitions. Word has length 18 [2021-06-12 20:02:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:58,048 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1290 transitions. [2021-06-12 20:02:58,048 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) [2021-06-12 20:02:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1290 transitions. [2021-06-12 20:02:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:02:58,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:58,049 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:58,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7701,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:58,249 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2070552084, now seen corresponding path program 301 times [2021-06-12 20:02:58,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:58,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332934415] [2021-06-12 20:02:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:58,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:58,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332934415] [2021-06-12 20:02:58,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332934415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969798129] [2021-06-12 20:02:58,421 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 [2021-06-12 20:02:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:02:58,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:58,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,541 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 [2021-06-12 20:02:58,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,545 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 27 treesize of output 21 [2021-06-12 20:02:58,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:02:58,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,549 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 25 treesize of output 19 [2021-06-12 20:02:58,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:02:58,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:58,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:02:58,597 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:155 [2021-06-12 20:02:58,944 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 21=[array_2]} [2021-06-12 20:02:58,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,949 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 [2021-06-12 20:02:58,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,955 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 28 treesize of output 22 [2021-06-12 20:02:58,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,960 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 18 treesize of output 14 [2021-06-12 20:02:58,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,966 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 [2021-06-12 20:02:58,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,972 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 17 treesize of output 13 [2021-06-12 20:02:58,972 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,977 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 16 treesize of output 12 [2021-06-12 20:02:58,978 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,983 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 19 treesize of output 15 [2021-06-12 20:02:58,983 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,988 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 20 treesize of output 16 [2021-06-12 20:02:58,989 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,995 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 15 treesize of output 11 [2021-06-12 20:02:58,996 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,002 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 26 treesize of output 20 [2021-06-12 20:02:59,003 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,010 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 [2021-06-12 20:02:59,010 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,016 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 [2021-06-12 20:02:59,017 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,219 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2021-06-12 20:02:59,220 INFO L628 ElimStorePlain]: treesize reduction 110, result has 65.0 percent of original size [2021-06-12 20:02:59,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,224 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 21 treesize of output 7 [2021-06-12 20:02:59,225 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,229 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 11 treesize of output 3 [2021-06-12 20:02:59,230 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:59,233 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 9 treesize of output 3 [2021-06-12 20:02:59,234 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:59,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:02:59,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:02:59,317 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:459, output treesize:105 [2021-06-12 20:02:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:59,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969798129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:59,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:59,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:02:59,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844377792] [2021-06-12 20:02:59,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:02:59,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:59,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:02:59,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:02:59,420 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) [2021-06-12 20:02:59,894 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-12 20:03:00,160 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2021-06-12 20:03:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:00,356 INFO L93 Difference]: Finished difference Result 456 states and 1442 transitions. [2021-06-12 20:03:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:00,356 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 [2021-06-12 20:03:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:00,357 INFO L225 Difference]: With dead ends: 456 [2021-06-12 20:03:00,357 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 20:03:00,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1117.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 20:03:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 402. [2021-06-12 20:03:00,360 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) [2021-06-12 20:03:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1295 transitions. [2021-06-12 20:03:00,361 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1295 transitions. Word has length 18 [2021-06-12 20:03:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:00,361 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1295 transitions. [2021-06-12 20:03:00,361 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) [2021-06-12 20:03:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1295 transitions. [2021-06-12 20:03:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:00,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:00,362 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:00,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7713,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:00,562 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:00,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1144528640, now seen corresponding path program 302 times [2021-06-12 20:03:00,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:00,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346761868] [2021-06-12 20:03:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:00,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346761868] [2021-06-12 20:03:00,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346761868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:00,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701475067] [2021-06-12 20:03:00,763 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 [2021-06-12 20:03:00,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:00,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:00,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:00,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,874 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 25 treesize of output 19 [2021-06-12 20:03:00,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,878 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 [2021-06-12 20:03:00,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,882 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 16 treesize of output 12 [2021-06-12 20:03:00,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,886 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 26 treesize of output 20 [2021-06-12 20:03:00,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,891 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 [2021-06-12 20:03:00,891 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:00,894 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 24 treesize of output 18 [2021-06-12 20:03:00,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:00,990 INFO L628 ElimStorePlain]: treesize reduction 82, result has 61.1 percent of original size [2021-06-12 20:03:00,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:00,992 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:277, output treesize:129 [2021-06-12 20:03:01,268 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_1947, array_4], 6=[v_prenex_1946, array_2]} [2021-06-12 20:03:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,273 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 35 treesize of output 27 [2021-06-12 20:03:01,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:01,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,280 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 [2021-06-12 20:03:01,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:01,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,290 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 25 treesize of output 19 [2021-06-12 20:03:01,291 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,387 INFO L628 ElimStorePlain]: treesize reduction 193, result has 38.3 percent of original size [2021-06-12 20:03:01,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:01,391 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,394 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 7 treesize of output 5 [2021-06-12 20:03:01,395 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,432 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 20 treesize of output 9 [2021-06-12 20:03:01,433 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,436 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 20 treesize of output 9 [2021-06-12 20:03:01,437 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:01,475 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:01,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:01,477 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:278, output treesize:45 [2021-06-12 20:03:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:01,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701475067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:01,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:01,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:03:01,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016688688] [2021-06-12 20:03:01,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:01,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:01,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:01,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:01,539 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) [2021-06-12 20:03:02,051 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-06-12 20:03:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:02,283 INFO L93 Difference]: Finished difference Result 514 states and 1587 transitions. [2021-06-12 20:03:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:02,283 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 [2021-06-12 20:03:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:02,284 INFO L225 Difference]: With dead ends: 514 [2021-06-12 20:03:02,284 INFO L226 Difference]: Without dead ends: 500 [2021-06-12 20:03:02,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 845.6ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:02,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-12 20:03:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 404. [2021-06-12 20:03:02,288 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) [2021-06-12 20:03:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1312 transitions. [2021-06-12 20:03:02,288 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1312 transitions. Word has length 18 [2021-06-12 20:03:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:02,289 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1312 transitions. [2021-06-12 20:03:02,289 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) [2021-06-12 20:03:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1312 transitions. [2021-06-12 20:03:02,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:02,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:02,289 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:02,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7731 [2021-06-12 20:03:02,490 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash 929513634, now seen corresponding path program 303 times [2021-06-12 20:03:02,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:02,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343757923] [2021-06-12 20:03:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:02,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343757923] [2021-06-12 20:03:02,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343757923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067750613] [2021-06-12 20:03:02,627 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 [2021-06-12 20:03:02,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 20:03:02,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,728 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 [2021-06-12 20:03:02,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,731 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 [2021-06-12 20:03:02,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,735 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 15 treesize of output 11 [2021-06-12 20:03:02,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,738 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 26 treesize of output 20 [2021-06-12 20:03:02,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,790 INFO L628 ElimStorePlain]: treesize reduction 35, result has 70.1 percent of original size [2021-06-12 20:03:02,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:02,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:163, output treesize:82 [2021-06-12 20:03:02,946 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 3=[array_2]} [2021-06-12 20:03:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,950 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 34 treesize of output 26 [2021-06-12 20:03:02,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,955 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 15 treesize of output 11 [2021-06-12 20:03:02,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,960 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 25 treesize of output 19 [2021-06-12 20:03:02,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,964 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 35 treesize of output 27 [2021-06-12 20:03:02,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:02,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:02,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,973 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 [2021-06-12 20:03:02,974 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,052 INFO L628 ElimStorePlain]: treesize reduction 191, result has 30.5 percent of original size [2021-06-12 20:03:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,056 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 21 treesize of output 7 [2021-06-12 20:03:03,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,059 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 21 treesize of output 7 [2021-06-12 20:03:03,060 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:03,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:03,090 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:274, output treesize:55 [2021-06-12 20:03:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:03,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067750613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:03,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:03:03,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084333583] [2021-06-12 20:03:03,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:03,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:03,181 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) [2021-06-12 20:03:03,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:03,605 INFO L93 Difference]: Finished difference Result 464 states and 1487 transitions. [2021-06-12 20:03:03,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:03,605 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 [2021-06-12 20:03:03,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:03,606 INFO L225 Difference]: With dead ends: 464 [2021-06-12 20:03:03,606 INFO L226 Difference]: Without dead ends: 459 [2021-06-12 20:03:03,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-12 20:03:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 398. [2021-06-12 20:03:03,610 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) [2021-06-12 20:03:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1285 transitions. [2021-06-12 20:03:03,610 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1285 transitions. Word has length 18 [2021-06-12 20:03:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:03,610 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1285 transitions. [2021-06-12 20:03:03,610 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) [2021-06-12 20:03:03,611 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1285 transitions. [2021-06-12 20:03:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:03,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:03,611 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:03,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7749,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:03,811 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:03,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:03,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1134489392, now seen corresponding path program 304 times [2021-06-12 20:03:03,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:03,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908855608] [2021-06-12 20:03:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:04,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908855608] [2021-06-12 20:03:04,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908855608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351289198] [2021-06-12 20:03:04,018 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 [2021-06-12 20:03:04,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:03:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:04,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,140 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 15 treesize of output 11 [2021-06-12 20:03:04,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,143 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 27 treesize of output 21 [2021-06-12 20:03:04,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:04,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,147 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 25 treesize of output 19 [2021-06-12 20:03:04,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,151 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 17 treesize of output 13 [2021-06-12 20:03:04,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:04,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:165, output treesize:155 [2021-06-12 20:03:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,278 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 17 treesize of output 13 [2021-06-12 20:03:04,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,283 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 29 treesize of output 23 [2021-06-12 20:03:04,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:04,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,292 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 25 treesize of output 19 [2021-06-12 20:03:04,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,298 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,299 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,302 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 19 treesize of output 15 [2021-06-12 20:03:04,303 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:04,306 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,309 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 28 treesize of output 22 [2021-06-12 20:03:04,310 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,313 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 15 treesize of output 11 [2021-06-12 20:03:04,314 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,393 INFO L628 ElimStorePlain]: treesize reduction 110, result has 49.8 percent of original size [2021-06-12 20:03:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,396 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 11 treesize of output 3 [2021-06-12 20:03:04,397 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,400 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 21 treesize of output 7 [2021-06-12 20:03:04,400 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:04,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:04,434 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:421, output treesize:87 [2021-06-12 20:03:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351289198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:04,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:03:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701333436] [2021-06-12 20:03:04,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:04,599 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) [2021-06-12 20:03:05,037 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2021-06-12 20:03:05,345 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-12 20:03:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:05,434 INFO L93 Difference]: Finished difference Result 455 states and 1437 transitions. [2021-06-12 20:03:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:05,434 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 [2021-06-12 20:03:05,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:05,435 INFO L225 Difference]: With dead ends: 455 [2021-06-12 20:03:05,435 INFO L226 Difference]: Without dead ends: 447 [2021-06-12 20:03:05,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 974.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-12 20:03:05,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 397. [2021-06-12 20:03:05,442 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) [2021-06-12 20:03:05,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1281 transitions. [2021-06-12 20:03:05,443 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1281 transitions. Word has length 18 [2021-06-12 20:03:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:05,443 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1281 transitions. [2021-06-12 20:03:05,443 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) [2021-06-12 20:03:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1281 transitions. [2021-06-12 20:03:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:05,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:05,443 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:05,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7760 [2021-06-12 20:03:05,644 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:05,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:05,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1272097146, now seen corresponding path program 305 times [2021-06-12 20:03:05,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:05,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733939154] [2021-06-12 20:03:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:05,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733939154] [2021-06-12 20:03:05,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733939154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245107331] [2021-06-12 20:03:05,806 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 [2021-06-12 20:03:05,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:05,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,905 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 26 treesize of output 20 [2021-06-12 20:03:05,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,909 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 [2021-06-12 20:03:05,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,913 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 25 treesize of output 19 [2021-06-12 20:03:05,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:05,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,965 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2021-06-12 20:03:05,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:05,966 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:155, output treesize:76 [2021-06-12 20:03:06,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:06,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,024 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 18 treesize of output 14 [2021-06-12 20:03:06,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,029 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 [2021-06-12 20:03:06,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:06,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,036 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 25 treesize of output 19 [2021-06-12 20:03:06,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:06,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,043 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 35 treesize of output 27 [2021-06-12 20:03:06,045 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,049 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 34 treesize of output 26 [2021-06-12 20:03:06,050 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,053 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 25 treesize of output 19 [2021-06-12 20:03:06,054 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,135 INFO L628 ElimStorePlain]: treesize reduction 207, result has 32.1 percent of original size [2021-06-12 20:03:06,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,138 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 [2021-06-12 20:03:06,139 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:06,141 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 21 treesize of output 7 [2021-06-12 20:03:06,142 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:06,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:06,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:06,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:06,177 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:361, output treesize:70 [2021-06-12 20:03:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:06,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245107331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:06,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:06,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:03:06,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614535052] [2021-06-12 20:03:06,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:06,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:06,320 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) [2021-06-12 20:03:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:06,784 INFO L93 Difference]: Finished difference Result 466 states and 1466 transitions. [2021-06-12 20:03:06,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:06,784 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 [2021-06-12 20:03:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:06,785 INFO L225 Difference]: With dead ends: 466 [2021-06-12 20:03:06,785 INFO L226 Difference]: Without dead ends: 461 [2021-06-12 20:03:06,785 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-12 20:03:06,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 397. [2021-06-12 20:03:06,788 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) [2021-06-12 20:03:06,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1281 transitions. [2021-06-12 20:03:06,789 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1281 transitions. Word has length 18 [2021-06-12 20:03:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:06,789 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1281 transitions. [2021-06-12 20:03:06,789 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) [2021-06-12 20:03:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1281 transitions. [2021-06-12 20:03:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:06,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:06,790 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:06,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7774 [2021-06-12 20:03:06,990 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:06,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1661314044, now seen corresponding path program 306 times [2021-06-12 20:03:06,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:06,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069068680] [2021-06-12 20:03:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069068680] [2021-06-12 20:03:07,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069068680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643994353] [2021-06-12 20:03:07,179 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 [2021-06-12 20:03:07,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:07,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,277 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 26 treesize of output 20 [2021-06-12 20:03:07,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,280 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 [2021-06-12 20:03:07,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,284 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 [2021-06-12 20:03:07,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:07,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,335 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.0 percent of original size [2021-06-12 20:03:07,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:07,336 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:155, output treesize:76 [2021-06-12 20:03:07,390 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 7 treesize of output 5 [2021-06-12 20:03:07,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,394 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 18 treesize of output 14 [2021-06-12 20:03:07,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,398 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 15 treesize of output 11 [2021-06-12 20:03:07,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:07,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,406 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 25 treesize of output 19 [2021-06-12 20:03:07,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:07,410 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,413 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 35 treesize of output 27 [2021-06-12 20:03:07,414 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:07,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,418 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 34 treesize of output 26 [2021-06-12 20:03:07,419 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,422 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 [2021-06-12 20:03:07,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,502 INFO L628 ElimStorePlain]: treesize reduction 207, result has 32.1 percent of original size [2021-06-12 20:03:07,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,505 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 21 treesize of output 7 [2021-06-12 20:03:07,506 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2021-06-12 20:03:07,509 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:07,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:07,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:07,544 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 2 variables, input treesize:361, output treesize:70 [2021-06-12 20:03:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643994353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:07,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:03:07,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129479594] [2021-06-12 20:03:07,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:07,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:07,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:07,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:07,668 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) [2021-06-12 20:03:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:08,163 INFO L93 Difference]: Finished difference Result 449 states and 1423 transitions. [2021-06-12 20:03:08,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:08,163 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 [2021-06-12 20:03:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:08,164 INFO L225 Difference]: With dead ends: 449 [2021-06-12 20:03:08,164 INFO L226 Difference]: Without dead ends: 443 [2021-06-12 20:03:08,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 607.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-06-12 20:03:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 397. [2021-06-12 20:03:08,168 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) [2021-06-12 20:03:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1280 transitions. [2021-06-12 20:03:08,168 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1280 transitions. Word has length 18 [2021-06-12 20:03:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1280 transitions. [2021-06-12 20:03:08,168 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) [2021-06-12 20:03:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1280 transitions. [2021-06-12 20:03:08,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:08,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:08,169 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:08,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7786 [2021-06-12 20:03:08,369 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:08,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1800492912, now seen corresponding path program 307 times [2021-06-12 20:03:08,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:08,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960848630] [2021-06-12 20:03:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:08,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960848630] [2021-06-12 20:03:08,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960848630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996430888] [2021-06-12 20:03:08,589 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 [2021-06-12 20:03:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:08,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:08,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,721 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 15 treesize of output 11 [2021-06-12 20:03:08,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,725 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 25 treesize of output 19 [2021-06-12 20:03:08,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,729 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 24 treesize of output 18 [2021-06-12 20:03:08,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,734 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 [2021-06-12 20:03:08,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,738 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 34 treesize of output 26 [2021-06-12 20:03:08,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,742 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 35 treesize of output 27 [2021-06-12 20:03:08,744 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:08,884 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-12 20:03:08,885 INFO L628 ElimStorePlain]: treesize reduction 73, result has 75.8 percent of original size [2021-06-12 20:03:08,892 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. [2021-06-12 20:03:08,892 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:262, output treesize:229 [2021-06-12 20:03:09,052 INFO L446 ElimStorePlain]: Different costs {1=[array_4], 10=[array_2]} [2021-06-12 20:03:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:09,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,062 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 25 treesize of output 19 [2021-06-12 20:03:09,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,068 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 15 treesize of output 11 [2021-06-12 20:03:09,069 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,074 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 28 treesize of output 22 [2021-06-12 20:03:09,075 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,080 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 28 treesize of output 22 [2021-06-12 20:03:09,081 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,086 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 25 treesize of output 19 [2021-06-12 20:03:09,087 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,092 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 28 treesize of output 22 [2021-06-12 20:03:09,093 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,098 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 16 treesize of output 12 [2021-06-12 20:03:09,098 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,103 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 26 treesize of output 20 [2021-06-12 20:03:09,104 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,109 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 47 treesize of output 37 [2021-06-12 20:03:09,110 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:09,114 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:09,118 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,122 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 26 treesize of output 20 [2021-06-12 20:03:09,123 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:09,127 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,264 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2021-06-12 20:03:09,264 INFO L628 ElimStorePlain]: treesize reduction 230, result has 41.0 percent of original size [2021-06-12 20:03:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,268 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 21 treesize of output 7 [2021-06-12 20:03:09,269 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,272 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 [2021-06-12 20:03:09,273 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:09,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:03:09,324 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 6 variables, input treesize:689, output treesize:102 [2021-06-12 20:03:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:09,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996430888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:09,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:03:09,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547519523] [2021-06-12 20:03:09,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:09,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:09,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:09,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:09,469 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) [2021-06-12 20:03:09,993 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2021-06-12 20:03:10,322 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-12 20:03:10,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:10,387 INFO L93 Difference]: Finished difference Result 452 states and 1431 transitions. [2021-06-12 20:03:10,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:10,388 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 [2021-06-12 20:03:10,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:10,388 INFO L225 Difference]: With dead ends: 452 [2021-06-12 20:03:10,388 INFO L226 Difference]: Without dead ends: 446 [2021-06-12 20:03:10,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 965.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-12 20:03:10,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 396. [2021-06-12 20:03:10,392 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) [2021-06-12 20:03:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1274 transitions. [2021-06-12 20:03:10,393 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1274 transitions. Word has length 18 [2021-06-12 20:03:10,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:10,393 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1274 transitions. [2021-06-12 20:03:10,393 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) [2021-06-12 20:03:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1274 transitions. [2021-06-12 20:03:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:10,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:10,393 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:10,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7800,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:10,594 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:10,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:10,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1262637334, now seen corresponding path program 308 times [2021-06-12 20:03:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:10,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266676791] [2021-06-12 20:03:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266676791] [2021-06-12 20:03:10,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266676791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743583919] [2021-06-12 20:03:10,749 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 [2021-06-12 20:03:10,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:10,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:03:10,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:10,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,862 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 17 treesize of output 13 [2021-06-12 20:03:10,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,866 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 27 treesize of output 21 [2021-06-12 20:03:10,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:10,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,870 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 [2021-06-12 20:03:10,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,873 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 25 treesize of output 19 [2021-06-12 20:03:10,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:10,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:10,913 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:149, output treesize:139 [2021-06-12 20:03:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,991 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 [2021-06-12 20:03:10,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,995 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 18 treesize of output 14 [2021-06-12 20:03:10,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:10,999 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 28 treesize of output 22 [2021-06-12 20:03:10,999 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,003 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 29 treesize of output 23 [2021-06-12 20:03:11,003 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:11,007 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:11,010 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:11,013 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:11,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,019 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 19 treesize of output 15 [2021-06-12 20:03:11,019 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,022 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 25 treesize of output 19 [2021-06-12 20:03:11,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,089 INFO L628 ElimStorePlain]: treesize reduction 64, result has 58.2 percent of original size [2021-06-12 20:03:11,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,093 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 11 treesize of output 3 [2021-06-12 20:03:11,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:11,096 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 21 treesize of output 7 [2021-06-12 20:03:11,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:11,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:11,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:11,124 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:371, output treesize:67 [2021-06-12 20:03:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:11,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743583919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:11,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:03:11,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484825660] [2021-06-12 20:03:11,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:11,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:11,241 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) [2021-06-12 20:03:11,618 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 20:03:11,795 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-06-12 20:03:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:12,107 INFO L93 Difference]: Finished difference Result 462 states and 1457 transitions. [2021-06-12 20:03:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:12,108 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 [2021-06-12 20:03:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:12,108 INFO L225 Difference]: With dead ends: 462 [2021-06-12 20:03:12,109 INFO L226 Difference]: Without dead ends: 456 [2021-06-12 20:03:12,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 871.5ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:12,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-12 20:03:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 393. [2021-06-12 20:03:12,112 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) [2021-06-12 20:03:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1265 transitions. [2021-06-12 20:03:12,113 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1265 transitions. Word has length 18 [2021-06-12 20:03:12,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:12,113 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 1265 transitions. [2021-06-12 20:03:12,113 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) [2021-06-12 20:03:12,113 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1265 transitions. [2021-06-12 20:03:12,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:12,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:12,113 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:12,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7825,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:12,314 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:12,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1966146404, now seen corresponding path program 309 times [2021-06-12 20:03:12,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:12,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22384767] [2021-06-12 20:03:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:12,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22384767] [2021-06-12 20:03:12,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22384767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944840573] [2021-06-12 20:03:12,430 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 [2021-06-12 20:03:12,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:12,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:12,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:12,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,533 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 16 treesize of output 12 [2021-06-12 20:03:12,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,537 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 [2021-06-12 20:03:12,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-12 20:03:12,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,544 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 15 treesize of output 11 [2021-06-12 20:03:12,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,595 INFO L628 ElimStorePlain]: treesize reduction 36, result has 68.7 percent of original size [2021-06-12 20:03:12,597 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. [2021-06-12 20:03:12,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:71 [2021-06-12 20:03:12,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,858 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 25 treesize of output 19 [2021-06-12 20:03:12,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 20:03:12,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,868 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 15 treesize of output 11 [2021-06-12 20:03:12,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,873 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 35 treesize of output 27 [2021-06-12 20:03:12,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:12,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:12,878 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,882 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 [2021-06-12 20:03:12,883 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,968 INFO L628 ElimStorePlain]: treesize reduction 206, result has 31.3 percent of original size [2021-06-12 20:03:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,972 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 21 treesize of output 7 [2021-06-12 20:03:12,972 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,975 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 [2021-06-12 20:03:12,975 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:13,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:13,010 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 6 variables, input treesize:304, output treesize:38 [2021-06-12 20:03:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944840573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:13,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 20:03:13,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329345821] [2021-06-12 20:03:13,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:03:13,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:13,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:03:13,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:03:13,067 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) [2021-06-12 20:03:14,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:14,017 INFO L93 Difference]: Finished difference Result 562 states and 1712 transitions. [2021-06-12 20:03:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:03:14,018 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 [2021-06-12 20:03:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:14,018 INFO L225 Difference]: With dead ends: 562 [2021-06-12 20:03:14,018 INFO L226 Difference]: Without dead ends: 550 [2021-06-12 20:03:14,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 815.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-12 20:03:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 400. [2021-06-12 20:03:14,023 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) [2021-06-12 20:03:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1293 transitions. [2021-06-12 20:03:14,023 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1293 transitions. Word has length 18 [2021-06-12 20:03:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:14,023 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1293 transitions. [2021-06-12 20:03:14,023 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) [2021-06-12 20:03:14,023 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1293 transitions. [2021-06-12 20:03:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:14,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:14,024 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:14,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7837 [2021-06-12 20:03:14,224 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1921892526, now seen corresponding path program 310 times [2021-06-12 20:03:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:14,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907655339] [2021-06-12 20:03:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:14,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:14,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907655339] [2021-06-12 20:03:14,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907655339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788841180] [2021-06-12 20:03:14,352 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 [2021-06-12 20:03:14,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:14,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:14,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:14,424 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 [2021-06-12 20:03:14,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:14,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:14,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:14,434 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 25 treesize of output 19 [2021-06-12 20:03:14,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,437 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 25 treesize of output 19 [2021-06-12 20:03:14,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,441 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 24 treesize of output 18 [2021-06-12 20:03:14,441 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,548 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-12 20:03:14,548 INFO L628 ElimStorePlain]: treesize reduction 62, result has 76.6 percent of original size [2021-06-12 20:03:14,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:14,550 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:229, output treesize:203 [2021-06-12 20:03:15,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,086 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 27 treesize of output 21 [2021-06-12 20:03:15,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,092 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 26 treesize of output 20 [2021-06-12 20:03:15,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,098 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 16 treesize of output 12 [2021-06-12 20:03:15,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,103 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 28 treesize of output 22 [2021-06-12 20:03:15,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:15,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,110 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 27 treesize of output 21 [2021-06-12 20:03:15,111 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,117 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 25 treesize of output 19 [2021-06-12 20:03:15,118 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,123 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 26 treesize of output 20 [2021-06-12 20:03:15,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,129 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 15 treesize of output 11 [2021-06-12 20:03:15,130 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,135 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 28 treesize of output 22 [2021-06-12 20:03:15,136 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,141 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 27 treesize of output 21 [2021-06-12 20:03:15,142 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,147 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 16 treesize of output 12 [2021-06-12 20:03:15,148 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,153 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 15 treesize of output 11 [2021-06-12 20:03:15,154 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,159 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 28 treesize of output 22 [2021-06-12 20:03:15,160 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,165 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 [2021-06-12 20:03:15,166 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,312 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-06-12 20:03:15,312 INFO L628 ElimStorePlain]: treesize reduction 181, result has 45.6 percent of original size [2021-06-12 20:03:15,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,316 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 20 treesize of output 9 [2021-06-12 20:03:15,317 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:15,320 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 20 treesize of output 9 [2021-06-12 20:03:15,321 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:15,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 20:03:15,377 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 9 variables, input treesize:493, output treesize:61 [2021-06-12 20:03:15,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:15,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788841180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:15,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:03:15,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675904324] [2021-06-12 20:03:15,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:15,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:15,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:15,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:15,462 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) [2021-06-12 20:03:15,887 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 89 [2021-06-12 20:03:16,197 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2021-06-12 20:03:16,478 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 101 [2021-06-12 20:03:16,748 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 111 [2021-06-12 20:03:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:16,787 INFO L93 Difference]: Finished difference Result 487 states and 1518 transitions. [2021-06-12 20:03:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:16,787 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 [2021-06-12 20:03:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:16,788 INFO L225 Difference]: With dead ends: 487 [2021-06-12 20:03:16,788 INFO L226 Difference]: Without dead ends: 470 [2021-06-12 20:03:16,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1580.5ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:16,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-12 20:03:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 404. [2021-06-12 20:03:16,792 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) [2021-06-12 20:03:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1298 transitions. [2021-06-12 20:03:16,792 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1298 transitions. Word has length 18 [2021-06-12 20:03:16,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:16,792 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1298 transitions. [2021-06-12 20:03:16,792 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) [2021-06-12 20:03:16,793 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1298 transitions. [2021-06-12 20:03:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:16,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:16,793 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:16,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7858,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:16,993 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash 17080050, now seen corresponding path program 311 times [2021-06-12 20:03:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:16,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645274844] [2021-06-12 20:03:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645274844] [2021-06-12 20:03:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645274844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759921375] [2021-06-12 20:03:17,148 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 [2021-06-12 20:03:17,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:17,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:03:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,222 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 15 treesize of output 11 [2021-06-12 20:03:17,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,225 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 26 treesize of output 20 [2021-06-12 20:03:17,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,229 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 [2021-06-12 20:03:17,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,231 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 16 treesize of output 12 [2021-06-12 20:03:17,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,298 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:03:17,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:17,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-12 20:03:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,515 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 [2021-06-12 20:03:17,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:17,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,518 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 [2021-06-12 20:03:17,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,558 INFO L628 ElimStorePlain]: treesize reduction 59, result has 52.0 percent of original size [2021-06-12 20:03:17,561 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 7 treesize of output 5 [2021-06-12 20:03:17,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,576 INFO L518 ElimStorePlain]: Eliminatee array_4 vanished before elimination [2021-06-12 20:03:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,578 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 21 treesize of output 7 [2021-06-12 20:03:17,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,581 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 11 treesize of output 3 [2021-06-12 20:03:17,581 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:17,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:17,601 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:119, output treesize:18 [2021-06-12 20:03:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759921375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:17,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:03:17,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451642569] [2021-06-12 20:03:17,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:17,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:17,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:17,623 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) [2021-06-12 20:03:17,937 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 20:03:18,219 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:03:18,358 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 20:03:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:18,619 INFO L93 Difference]: Finished difference Result 509 states and 1583 transitions. [2021-06-12 20:03:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:03:18,619 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 [2021-06-12 20:03:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:18,620 INFO L225 Difference]: With dead ends: 509 [2021-06-12 20:03:18,620 INFO L226 Difference]: Without dead ends: 497 [2021-06-12 20:03:18,620 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 989.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:03:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-12 20:03:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 407. [2021-06-12 20:03:18,624 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) [2021-06-12 20:03:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1308 transitions. [2021-06-12 20:03:18,625 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1308 transitions. Word has length 18 [2021-06-12 20:03:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1308 transitions. [2021-06-12 20:03:18,625 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) [2021-06-12 20:03:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1308 transitions. [2021-06-12 20:03:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:18,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:18,626 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:18,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7886,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:18,826 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:18,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1498317920, now seen corresponding path program 312 times [2021-06-12 20:03:18,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:18,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407776704] [2021-06-12 20:03:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:19,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407776704] [2021-06-12 20:03:19,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407776704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917197066] [2021-06-12 20:03:19,041 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 [2021-06-12 20:03:19,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:19,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:19,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:03:19,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:19,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,130 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 15 treesize of output 11 [2021-06-12 20:03:19,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,135 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 26 treesize of output 20 [2021-06-12 20:03:19,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,140 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 [2021-06-12 20:03:19,141 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,144 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 16 treesize of output 12 [2021-06-12 20:03:19,144 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,226 INFO L628 ElimStorePlain]: treesize reduction 4, result has 96.0 percent of original size [2021-06-12 20:03:19,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:19,227 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:147, output treesize:97 [2021-06-12 20:03:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,381 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 25 treesize of output 19 [2021-06-12 20:03:19,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,385 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 27 treesize of output 21 [2021-06-12 20:03:19,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,389 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 17 treesize of output 13 [2021-06-12 20:03:19,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,392 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:19,393 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,396 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 17 treesize of output 13 [2021-06-12 20:03:19,397 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,400 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 15 treesize of output 11 [2021-06-12 20:03:19,401 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,403 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 15 treesize of output 11 [2021-06-12 20:03:19,404 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,457 INFO L628 ElimStorePlain]: treesize reduction 81, result has 49.1 percent of original size [2021-06-12 20:03:19,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,460 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 11 treesize of output 3 [2021-06-12 20:03:19,460 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,462 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 [2021-06-12 20:03:19,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:19,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:19,491 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:200, output treesize:56 [2021-06-12 20:03:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917197066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:19,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:03:19,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265947084] [2021-06-12 20:03:19,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:19,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:19,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:19,559 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) [2021-06-12 20:03:20,005 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-12 20:03:20,344 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-06-12 20:03:20,484 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-12 20:03:20,631 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-12 20:03:20,833 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-12 20:03:20,996 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 20:03:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:21,167 INFO L93 Difference]: Finished difference Result 533 states and 1641 transitions. [2021-06-12 20:03:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:03:21,167 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 [2021-06-12 20:03:21,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:21,168 INFO L225 Difference]: With dead ends: 533 [2021-06-12 20:03:21,168 INFO L226 Difference]: Without dead ends: 519 [2021-06-12 20:03:21,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1576.1ms TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:03:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-12 20:03:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 405. [2021-06-12 20:03:21,172 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) [2021-06-12 20:03:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-06-12 20:03:21,172 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-06-12 20:03:21,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:21,172 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-06-12 20:03:21,172 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) [2021-06-12 20:03:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-06-12 20:03:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:21,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:21,173 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:21,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7899,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:21,373 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash 218254206, now seen corresponding path program 313 times [2021-06-12 20:03:21,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:21,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753397647] [2021-06-12 20:03:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:21,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753397647] [2021-06-12 20:03:21,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753397647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328470645] [2021-06-12 20:03:21,572 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 [2021-06-12 20:03:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:21,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,653 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 25 treesize of output 19 [2021-06-12 20:03:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,657 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 [2021-06-12 20:03:21,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,660 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 26 treesize of output 20 [2021-06-12 20:03:21,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,664 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 25 treesize of output 19 [2021-06-12 20:03:21,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,668 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 [2021-06-12 20:03:21,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,670 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 24 treesize of output 18 [2021-06-12 20:03:21,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,731 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:03:21,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:21,732 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:03:21,973 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1982], 1=[array_0, v_prenex_1981]} [2021-06-12 20:03:21,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:21,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,979 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 [2021-06-12 20:03:21,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,010 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 20:03:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:22,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:22,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:22,028 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:03:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,031 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 21 treesize of output 7 [2021-06-12 20:03:22,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,033 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 [2021-06-12 20:03:22,034 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:22,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:22,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:22,055 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:03:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:22,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328470645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:22,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:03:22,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910013589] [2021-06-12 20:03:22,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:22,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:22,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:22,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:22,075 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) [2021-06-12 20:03:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:22,703 INFO L93 Difference]: Finished difference Result 543 states and 1663 transitions. [2021-06-12 20:03:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:22,703 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 [2021-06-12 20:03:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:22,704 INFO L225 Difference]: With dead ends: 543 [2021-06-12 20:03:22,704 INFO L226 Difference]: Without dead ends: 538 [2021-06-12 20:03:22,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-12 20:03:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-06-12 20:03:22,708 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) [2021-06-12 20:03:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1331 transitions. [2021-06-12 20:03:22,709 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1331 transitions. Word has length 18 [2021-06-12 20:03:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:22,709 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1331 transitions. [2021-06-12 20:03:22,709 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) [2021-06-12 20:03:22,709 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1331 transitions. [2021-06-12 20:03:22,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:22,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:22,709 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:22,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7910,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:22,910 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:22,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:22,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1074750152, now seen corresponding path program 314 times [2021-06-12 20:03:22,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:22,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468760478] [2021-06-12 20:03:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:23,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468760478] [2021-06-12 20:03:23,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468760478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743113056] [2021-06-12 20:03:23,081 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 [2021-06-12 20:03:23,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:23,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:23,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,164 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 25 treesize of output 19 [2021-06-12 20:03:23,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,168 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 [2021-06-12 20:03:23,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,171 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 [2021-06-12 20:03:23,172 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,175 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 [2021-06-12 20:03:23,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,178 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 [2021-06-12 20:03:23,179 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,181 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 24 treesize of output 18 [2021-06-12 20:03:23,182 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,243 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:03:23,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:23,244 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:03:23,502 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1987], 1=[array_0, v_prenex_1986]} [2021-06-12 20:03:23,504 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 25 treesize of output 19 [2021-06-12 20:03:23,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,508 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 15 treesize of output 11 [2021-06-12 20:03:23,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,538 INFO L628 ElimStorePlain]: treesize reduction 62, result has 42.6 percent of original size [2021-06-12 20:03:23,540 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 27 treesize of output 21 [2021-06-12 20:03:23,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:23,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,556 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:03:23,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,559 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 11 treesize of output 3 [2021-06-12 20:03:23,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:23,561 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 21 treesize of output 7 [2021-06-12 20:03:23,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:23,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:23,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:23,583 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:03:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743113056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:23,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:03:23,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554515806] [2021-06-12 20:03:23,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:23,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:23,605 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) [2021-06-12 20:03:24,086 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-12 20:03:24,290 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-12 20:03:24,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:24,422 INFO L93 Difference]: Finished difference Result 539 states and 1664 transitions. [2021-06-12 20:03:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:24,422 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 [2021-06-12 20:03:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:24,423 INFO L225 Difference]: With dead ends: 539 [2021-06-12 20:03:24,423 INFO L226 Difference]: Without dead ends: 534 [2021-06-12 20:03:24,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 895.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:24,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-06-12 20:03:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 413. [2021-06-12 20:03:24,427 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) [2021-06-12 20:03:24,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1343 transitions. [2021-06-12 20:03:24,428 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1343 transitions. Word has length 18 [2021-06-12 20:03:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:24,428 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1343 transitions. [2021-06-12 20:03:24,428 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) [2021-06-12 20:03:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1343 transitions. [2021-06-12 20:03:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:24,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:24,428 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:24,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7927 [2021-06-12 20:03:24,629 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -865238594, now seen corresponding path program 315 times [2021-06-12 20:03:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:24,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457627393] [2021-06-12 20:03:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:24,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457627393] [2021-06-12 20:03:24,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457627393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532113377] [2021-06-12 20:03:24,793 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 [2021-06-12 20:03:24,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:24,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:24,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,875 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 [2021-06-12 20:03:24,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,879 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 16 treesize of output 12 [2021-06-12 20:03:24,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,882 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 [2021-06-12 20:03:24,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,886 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 25 treesize of output 19 [2021-06-12 20:03:24,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,890 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 15 treesize of output 11 [2021-06-12 20:03:24,890 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,892 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 [2021-06-12 20:03:24,893 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,953 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:03:24,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:24,954 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:03:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,167 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 25 treesize of output 19 [2021-06-12 20:03:25,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,171 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 35 treesize of output 27 [2021-06-12 20:03:25,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 4 xjuncts. [2021-06-12 20:03:25,239 INFO L628 ElimStorePlain]: treesize reduction 154, result has 35.6 percent of original size [2021-06-12 20:03:25,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,242 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 21 treesize of output 7 [2021-06-12 20:03:25,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,245 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 21 treesize of output 7 [2021-06-12 20:03:25,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,277 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 7 treesize of output 5 [2021-06-12 20:03:25,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:25,298 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1991 vanished before elimination [2021-06-12 20:03:25,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:25,299 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:165, output treesize:38 [2021-06-12 20:03:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:25,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532113377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:25,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:03:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723393410] [2021-06-12 20:03:25,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:25,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:25,359 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) [2021-06-12 20:03:26,008 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-12 20:03:26,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:26,179 INFO L93 Difference]: Finished difference Result 556 states and 1707 transitions. [2021-06-12 20:03:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:26,180 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 [2021-06-12 20:03:26,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:26,181 INFO L225 Difference]: With dead ends: 556 [2021-06-12 20:03:26,181 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 20:03:26,181 INFO L728 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 [2021-06-12 20:03:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 20:03:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 405. [2021-06-12 20:03:26,185 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) [2021-06-12 20:03:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1311 transitions. [2021-06-12 20:03:26,185 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1311 transitions. Word has length 18 [2021-06-12 20:03:26,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:26,186 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1311 transitions. [2021-06-12 20:03:26,186 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) [2021-06-12 20:03:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1311 transitions. [2021-06-12 20:03:26,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:26,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:26,186 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:26,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7945,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:26,387 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:26,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:26,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1291353208, now seen corresponding path program 316 times [2021-06-12 20:03:26,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:26,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968969904] [2021-06-12 20:03:26,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:26,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968969904] [2021-06-12 20:03:26,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968969904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:26,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500103198] [2021-06-12 20:03:26,587 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 [2021-06-12 20:03:26,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:26,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,685 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 [2021-06-12 20:03:26,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,689 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 16 treesize of output 12 [2021-06-12 20:03:26,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,692 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 26 treesize of output 20 [2021-06-12 20:03:26,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,696 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 [2021-06-12 20:03:26,696 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,699 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 [2021-06-12 20:03:26,700 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:26,702 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 24 treesize of output 18 [2021-06-12 20:03:26,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:26,763 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:03:26,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:26,764 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:03:27,029 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_1998], 1=[array_0, v_prenex_1997]} [2021-06-12 20:03:27,032 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 [2021-06-12 20:03:27,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,035 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 27 treesize of output 21 [2021-06-12 20:03:27,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:27,075 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 20:03:27,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:27,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,095 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 [2021-06-12 20:03:27,096 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,098 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 [2021-06-12 20:03:27,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:27,118 INFO L518 ElimStorePlain]: Eliminatee v_prenex_1997 vanished before elimination [2021-06-12 20:03:27,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:27,119 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:03:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500103198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:27,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 20:03:27,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783713945] [2021-06-12 20:03:27,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:27,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:27,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:27,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:27,139 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) [2021-06-12 20:03:27,523 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-12 20:03:27,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:27,684 INFO L93 Difference]: Finished difference Result 530 states and 1609 transitions. [2021-06-12 20:03:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:03:27,685 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 [2021-06-12 20:03:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:27,685 INFO L225 Difference]: With dead ends: 530 [2021-06-12 20:03:27,685 INFO L226 Difference]: Without dead ends: 525 [2021-06-12 20:03:27,686 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 734.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:03:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-12 20:03:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 407. [2021-06-12 20:03:27,690 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) [2021-06-12 20:03:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1315 transitions. [2021-06-12 20:03:27,690 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1315 transitions. Word has length 18 [2021-06-12 20:03:27,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:27,690 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1315 transitions. [2021-06-12 20:03:27,690 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) [2021-06-12 20:03:27,690 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1315 transitions. [2021-06-12 20:03:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:27,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:27,691 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:27,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7963,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:27,891 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2020148926, now seen corresponding path program 317 times [2021-06-12 20:03:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:27,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890329398] [2021-06-12 20:03:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:28,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890329398] [2021-06-12 20:03:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890329398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937185169] [2021-06-12 20:03:28,041 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 [2021-06-12 20:03:28,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:28,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:28,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 20:03:28,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:28,121 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 15 treesize of output 11 [2021-06-12 20:03:28,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:28,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:28,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:28,130 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 25 treesize of output 19 [2021-06-12 20:03:28,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:28,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:28,169 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:131, output treesize:119 [2021-06-12 20:03:28,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,581 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 25 treesize of output 19 [2021-06-12 20:03:28,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,586 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 17 treesize of output 13 [2021-06-12 20:03:28,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,591 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 16 treesize of output 12 [2021-06-12 20:03:28,592 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,597 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 27 treesize of output 21 [2021-06-12 20:03:28,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,602 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 18 treesize of output 14 [2021-06-12 20:03:28,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,607 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 26 treesize of output 20 [2021-06-12 20:03:28,608 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,613 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 15 treesize of output 11 [2021-06-12 20:03:28,613 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,618 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 15 treesize of output 11 [2021-06-12 20:03:28,619 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,623 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 [2021-06-12 20:03:28,624 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,629 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 18 treesize of output 14 [2021-06-12 20:03:28,629 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,633 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 16 treesize of output 12 [2021-06-12 20:03:28,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,638 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 19 treesize of output 15 [2021-06-12 20:03:28,639 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,785 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-06-12 20:03:28,785 INFO L628 ElimStorePlain]: treesize reduction 95, result has 62.3 percent of original size [2021-06-12 20:03:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,789 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 10 treesize of output 5 [2021-06-12 20:03:28,790 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,794 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 9 treesize of output 3 [2021-06-12 20:03:28,794 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,797 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 20 treesize of output 9 [2021-06-12 20:03:28,798 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:28,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 20:03:28,858 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 8 variables, input treesize:395, output treesize:76 [2021-06-12 20:03:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937185169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:28,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 20:03:28,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030152585] [2021-06-12 20:03:28,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:03:28,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:28,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:03:28,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:03:28,940 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) [2021-06-12 20:03:29,569 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 77 [2021-06-12 20:03:29,841 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 102 [2021-06-12 20:03:30,120 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2021-06-12 20:03:30,402 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 96 [2021-06-12 20:03:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:30,456 INFO L93 Difference]: Finished difference Result 521 states and 1598 transitions. [2021-06-12 20:03:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:03:30,456 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 [2021-06-12 20:03:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:30,457 INFO L225 Difference]: With dead ends: 521 [2021-06-12 20:03:30,457 INFO L226 Difference]: Without dead ends: 508 [2021-06-12 20:03:30,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1549.6ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-12 20:03:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 407. [2021-06-12 20:03:30,461 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) [2021-06-12 20:03:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1315 transitions. [2021-06-12 20:03:30,462 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1315 transitions. Word has length 18 [2021-06-12 20:03:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:30,462 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1315 transitions. [2021-06-12 20:03:30,462 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) [2021-06-12 20:03:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1315 transitions. [2021-06-12 20:03:30,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:30,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:30,462 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:30,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7980 [2021-06-12 20:03:30,663 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:30,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1179352520, now seen corresponding path program 318 times [2021-06-12 20:03:30,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:30,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8027998] [2021-06-12 20:03:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:30,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8027998] [2021-06-12 20:03:30,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8027998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314577443] [2021-06-12 20:03:30,854 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 [2021-06-12 20:03:30,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 20:03:30,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:30,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,937 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 25 treesize of output 19 [2021-06-12 20:03:30,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,941 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 16 treesize of output 12 [2021-06-12 20:03:30,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,944 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 26 treesize of output 20 [2021-06-12 20:03:30,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,948 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 25 treesize of output 19 [2021-06-12 20:03:30,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,951 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 15 treesize of output 11 [2021-06-12 20:03:30,952 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,954 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 24 treesize of output 18 [2021-06-12 20:03:30,955 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,015 INFO L628 ElimStorePlain]: treesize reduction 52, result has 60.9 percent of original size [2021-06-12 20:03:31,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:31,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:03:31,236 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_2007], 1=[array_0, v_prenex_2006]} [2021-06-12 20:03:31,239 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 [2021-06-12 20:03:31,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:31,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:31,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,283 INFO L628 ElimStorePlain]: treesize reduction 62, result has 50.8 percent of original size [2021-06-12 20:03:31,285 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 7 treesize of output 5 [2021-06-12 20:03:31,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,304 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 21 treesize of output 7 [2021-06-12 20:03:31,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,306 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 11 treesize of output 3 [2021-06-12 20:03:31,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:31,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2006 vanished before elimination [2021-06-12 20:03:31,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:31,328 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:122, output treesize:18 [2021-06-12 20:03:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314577443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:31,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 20:03:31,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745100897] [2021-06-12 20:03:31,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:03:31,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:03:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:03:31,349 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) [2021-06-12 20:03:31,730 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-06-12 20:03:31,970 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-12 20:03:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:32,111 INFO L93 Difference]: Finished difference Result 515 states and 1583 transitions. [2021-06-12 20:03:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:03:32,111 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 [2021-06-12 20:03:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:32,112 INFO L225 Difference]: With dead ends: 515 [2021-06-12 20:03:32,112 INFO L226 Difference]: Without dead ends: 510 [2021-06-12 20:03:32,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-12 20:03:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 408. [2021-06-12 20:03:32,116 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) [2021-06-12 20:03:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1317 transitions. [2021-06-12 20:03:32,117 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1317 transitions. Word has length 18 [2021-06-12 20:03:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:32,117 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1317 transitions. [2021-06-12 20:03:32,117 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) [2021-06-12 20:03:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1317 transitions. [2021-06-12 20:03:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:03:32,117 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:32,117 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8008,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:32,318 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1105980040, now seen corresponding path program 319 times [2021-06-12 20:03:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581277823] [2021-06-12 20:03:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:32,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:32,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581277823] [2021-06-12 20:03:32,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581277823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150267051] [2021-06-12 20:03:32,493 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 [2021-06-12 20:03:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:03:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,574 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 [2021-06-12 20:03:32,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,577 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 16 treesize of output 12 [2021-06-12 20:03:32,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,581 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 26 treesize of output 20 [2021-06-12 20:03:32,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,584 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 25 treesize of output 19 [2021-06-12 20:03:32,585 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,588 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 [2021-06-12 20:03:32,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,591 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 24 treesize of output 18 [2021-06-12 20:03:32,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,651 INFO L628 ElimStorePlain]: treesize reduction 58, result has 58.3 percent of original size [2021-06-12 20:03:32,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:32,652 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:205, output treesize:81 [2021-06-12 20:03:32,800 INFO L446 ElimStorePlain]: Different costs {0=[array_4, v_prenex_2009], 1=[array_0, v_prenex_2008]} [2021-06-12 20:03:32,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:32,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:32,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-06-12 20:03:32,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,854 INFO L628 ElimStorePlain]: treesize reduction 69, result has 48.1 percent of original size [2021-06-12 20:03:32,856 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 27 treesize of output 21 [2021-06-12 20:03:32,857 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 20:03:32,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,880 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 20:03:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,883 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 [2021-06-12 20:03:32,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:32,886 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 [2021-06-12 20:03:32,886 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:32,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:03:32,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 20:03:32,914 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:154, output treesize:53 Received shutdown request... [2021-06-12 20:03:32,970 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-12 20:03:33,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8026 [2021-06-12 20:03:33,171 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:03:33,173 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:03:33,174 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:03:33,174 INFO L202 PluginConnector]: Adding new model array-int-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:03:33 BasicIcfg [2021-06-12 20:03:33,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:03:33,175 INFO L168 Benchmark]: Toolchain (without parser) took 760645.56 ms. Allocated memory was 178.3 MB in the beginning and 308.3 MB in the end (delta: 130.0 MB). Free memory was 159.1 MB in the beginning and 178.5 MB in the end (delta: -19.4 MB). Peak memory consumption was 110.3 MB. Max. memory is 8.0 GB. [2021-06-12 20:03:33,175 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:03:33,175 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.45 ms. Allocated memory is still 178.3 MB. Free memory was 159.1 MB in the beginning and 157.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:03:33,175 INFO L168 Benchmark]: Boogie Preprocessor took 32.79 ms. Allocated memory is still 178.3 MB. Free memory was 157.6 MB in the beginning and 156.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:03:33,175 INFO L168 Benchmark]: RCFGBuilder took 402.45 ms. Allocated memory is still 178.3 MB. Free memory was 156.4 MB in the beginning and 134.7 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:03:33,175 INFO L168 Benchmark]: TraceAbstraction took 760175.61 ms. Allocated memory was 178.3 MB in the beginning and 308.3 MB in the end (delta: 130.0 MB). Free memory was 134.2 MB in the beginning and 178.5 MB in the end (delta: -44.2 MB). Peak memory consumption was 85.2 MB. Max. memory is 8.0 GB. [2021-06-12 20:03:33,175 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 0.13 ms. Allocated memory is still 178.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.45 ms. Allocated memory is still 178.3 MB. Free memory was 159.1 MB in the beginning and 157.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.79 ms. Allocated memory is still 178.3 MB. Free memory was 157.6 MB in the beginning and 156.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 402.45 ms. Allocated memory is still 178.3 MB. Free memory was 156.4 MB in the beginning and 134.7 MB in the end (delta: 21.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 760175.61 ms. Allocated memory was 178.3 MB in the beginning and 308.3 MB in the end (delta: 130.0 MB). Free memory was 134.2 MB in the beginning and 178.5 MB in the end (delta: -44.2 MB). Peak memory consumption was 85.2 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 8 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: 760020.0ms, OverallIterations: 360, TraceHistogramMax: 2, EmptinessCheckTime: 172.9ms, AutomataDifference: 334046.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11447 SDtfs, 26764 SDslu, 75495 SDs, 0 SdLazy, 176871 SolverSat, 2021 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89426.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12298 GetRequests, 4207 SyntacticMatches, 649 SemanticMatches, 7442 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24242 ImplicationChecksByTransitivity, 364428.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=437occurred in iteration=317, InterpolantAutomatonStates: 4176, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1486.9ms AutomataMinimizationTime, 359 MinimizatonAttempts, 38280 StatesRemovedByMinimization, 358 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1378.2ms SsaConstructionTime, 3621.1ms SatisfiabilityAnalysisTime, 339154.7ms InterpolantComputationTime, 12314 NumberOfCodeBlocks, 12314 NumberOfCodeBlocksAsserted, 1038 NumberOfCheckSat, 11602 ConstructedInterpolants, 854 QuantifiedInterpolants, 349847 SizeOfPredicates, 3539 NumberOfNonLiveVariables, 26328 ConjunctsInSsa, 7599 ConjunctsInUnsatCore, 712 InterpolantComputations, 6 PerfectInterpolantSequences, 23/2710 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